Tìm x:
e) (x+5) + (x-9) = x+2
f) (27-x) + ( 15+x) = x-24
tìm số nguyên x biết:
a)x - 5= -1
b)x +30= - 4
c)x -(-24)=3
d) 22 -( - x)=
e) ( x + 5) +(x - 9)= x+ 2
f) (27 - x) + (15 + x) = x - 24
a)\(x-5=-1\)
⇔\(x=4\)
b)\(x+30=-4\)
⇔\(x=-34\)
c)\(x-\left(-24\right)=3\)
⇔\(x+24=3\)
⇔\(x=-21\)
e)\(\left(x+5\right)+\left(x-9\right)=x+2\)
⇔\(x+5+x-9-x-2=0\)
⇔\(x-6=0\)
⇔\(x=6\)
f)\(\left(27-x\right)+\left(15+x\right)=x-24\)
⇔\(27-x+15+x-x+24=0\)
⇔\(66-x=0\)
⇔\(x=66\)
\(a.x-5=-1\) \(b.x+30=-4\)
\(x=\left(-1\right)+5\) \(x=\left(-4\right)-30\)
\(x=4\) \(x=-34\)
\(c.x-\left(-24\right)=3\) \(e.\left(x+5\right)+\left(x-9\right)=x+2\)
\(x=3+\left(-24\right)\) \(x+5+x-9=x+2\)
\(x=-21\) \(2x-4=x+2\)
\(2x-x=2+4\)
\(x=6\)
\(f.\left(27-x\right)+\left(15+x\right)=x-24\)
\(27-x+15+x=x-24\)
\(27+15=x-24\)
\(42=x-24\)
\(x=24+42\)
\(x=66\)
Tìm số tự nhiên x:
e, 96-5(2x-1)=41
f, 2x^2-15=17
g,(3x-2)^2+15=64
h, 3(x+5)-2.3^2=21
i, 5^x+9=134.1^2010
Giúp mình zớii
e) 96-5(2x-1)=41
5(2x-1)= 96-41
5(2x-1)=55
2x-1=55:5
2x-1=11
2x=11+1
2x=12
x=12:2
x=6
Bài 13 : Tìm số nguyên x biết :
a. x - 5 = - 1 c. x - ( - 24 ) = 3
b. x + 30 = 4 d. 22 - ( - x ) = 12
e. ( x + 5 ) + ( x - 9 ) = x + 2 f. ( 27 - x ) + ( 15 + x ) = x - 24
a)
\(x-5=-1\)
\(x=-1+5\)
\(x=4\)
b)
\(x+30=4\)
\(x=4-30\)
\(x=-26\)
c)
\(x-(-24)=3\)
\(x+24=3\)
\(x=3-24\)
\(x=-21\)
d)
\(22-(-x)=12\)
\(22+x=12\)
\(x=12-22\)
\(x=-10\)
e)
\(( x + 5 ) + ( x - 9 ) = x + 2\)
\(x+5+x-9=x+2\)
\(x+x-x=2+9-5\)
\(x=6\)
f)
\(( 27 - x ) + ( 15 + x ) = x - 24\)
\(27-x+15+x=x-24\)
\(-x+x-x=-24-15-27\)
\(-x=-66\)
\(x=66\)
x - 5 = -1 x - (-24) = 3
x = -1 + 5 x + 24 = 3
x = 4 x = 3 - 24
x + 30 = 4 x = - 21
x = 4 - 30 22 - ( -x) = 12
x = - 26 22 + x = 12
x + 5 + ( x - 9) = x + 2 x = 12 - 22
x + 5 + x - 9 = x + 2 x = -10
2x - x = 2 - 5 + 9 ( 27 - x) + ( 15 + x) = x - 24
x = - 3 + 9 27 - x + 15 + x = x - 24
x = 6 27 + 15 = x - 24
x - 24 = 42
x = 42 + 24
x = 66
Tìm số nguyên x biết:
a) x – 5 = - 1 ;
b) x + 30 = - 4;
c) x – ( - 24) = 3 ;
d) 22 – ( - x ) = 12;
e) ( x + 5 ) + ( x – 9 ) = x + 2 ;
f) ( 27 – x ) + ( 15 + x ) = x – 24 .
(27-X)+(15+x)=x-24
27-x+15+x=x-24
-x+x-x=-24-27-15
-x=-66
x=-(-66)
x=66
a) x – 5 = - 1 ;
=> x = -1 + 5 = 4
Vậy x = 4
b) x + 30 = - 4;
=> x = - 4 - 30 = - 34
Vậy x = - 34
c) x – ( - 24) = 3 ;
=> x + 24 = 3
=> x = 3 - 24
=> x = - 21
Vậy x = - 21
d) 22 – ( - x ) = 12;
=> 24 + x = 12
=> x = 12
Vậy x = 12
e) ( x + 5 ) + ( x – 9 ) = x + 2 ;
=> x + 5 +x - 9 = x + 2
=> 2x - x = 1 + 9 - 5
=> x = 5
Vậy x = 5
f) ( 27 – x ) + ( 15 + x ) = x – 24 .
=> 27 - x + 15 + x = x - 24
=> x + 42 = x - 24
=> x - x = 42 - 24
=> 0 = 8 ( vô lí)
Vậy x thuộc rỗng
Rảnh nhỉ
@@ Học tốt
## Chiyuki Fujito
a) \(x-5=-1\Rightarrow x=\left(-1\right)+5=4\)
b) \(x+30=-4\Leftrightarrow x=\left(-4\right)-30=-34\)
c) \(x-\left(-24\right)=3\Rightarrow x+24=3\Leftrightarrow x=3-24=-21\)
d) \(22-\left(-x\right)=12\Leftrightarrow22+x=12\Leftrightarrow x=12-22=-10\)
e) \(\left(x+5\right)+\left(x-9\right)=x+2\Leftrightarrow x+5+x-9=x+2\)
\(\Rightarrow x+x-x=2-5+9\Leftrightarrow x=6\) Vậy \(x=6\)
f) \(\left(27-x\right)+\left(15+x\right)=x-24\Leftrightarrow27-x+15+x=x-24\)
\(\Leftrightarrow27+15+24=x+x-x=x\Leftrightarrow x=66\) Vậy \(x=66\)
tìm số nguyên x
( x+ 5)+(x-9)=x+2
( 27 -x) +( 15+x )=x-24
giúp tui nhanh với tui tck cho
a)( x+ 5)+(x-9)=x+2
x + 5 + x - 9 = x + 2
x + x - x = 2 -5 +9
x = 6
b)( 27 -x) +( 15+x )=x-24
-x + x - x = -24 -27 -15
-x = -66
x=66
hok tốt!
\(a.\left(x+5\right)+\left(x-9\right)=\)\(x+2\)
\(\Rightarrow x+x-x=2+9-5\)
\(\Rightarrow x=6\)
\(b.\left(27-x\right)+\left(15+x\right)=x-24\)
\(\Rightarrow x-x-x=-24-27-15\)
\(\Rightarrow-x=-66\)
\(\Rightarrow x=66\)
(x+5)+(x-9)=x+2
<=> x+5+x-9=x+2
<=> x+5+x-9-x-2=0
<=> x-6=0
<=> x=6
Vậy x=6
(27-x)+(15+x)=x-24
<=> 27-x+15+x=x-24
<=> 27-x+15+x-x+24=0
<=>66-x=0
<=> x=66
Vậy x=66
-3x + 24 = -24
17 - 2x = -15
54 : ( x + 2) = -6
12 . ( 3 - x ) = 72
-3. ( x + 5) + 18 + -27
( x + 5 ) 2 = 9
( 3 - x )3 = 27
cần gấp ạ
trl đúng sẽ tick
17 - 2x = -15
2x = 17 - (-15)
2x = 32
x = 32 : 2
x = 16
--------
54 : (x + 2) = -6
x + 2 = 54 : (-6)
x + 2 = -9
x = -9 - 2
x = -11
--------
12.(3 - x) = 72
3 - x = 72 : 12
3 - x = 6
x = 3 - 6
x = -3
-------
-3(x + 5) + 18 = -27
-3(x + 5) = -27 - 18
-3(x + 5) = -45
x + 5 = -45 : (-3)
x + 5 = 15
x = 15 - 5
x = 10
-------
(x + 5)² = 9
x + 5 = 3 hoặc x + 5 = -3
*) x + 5 = 3
x = 3 - 5
x = -2
*) x + 5 = -3
x = -3 - 5
x = -8
Vậy x = -8; x = -2
--------
(3 - x)³ = 27
(3 - x)³ = 3³
3 - x = 3
x = 3 - 3
x = 0
- 3\(x\) + 24 = -24
3\(x\) = 24 + 24
3\(x\) = 48
\(x\) = 48 : 3
\(x\) = 16
Tìm x € Z
Câu 8:
5-|x-4|=-7+(23-54)-(-54+23)
Câu 9:
|x+7|=15+|-27|-(13-17+|-20|)
Câu 10:
|x-7|+24=24-x+(-24)+x+|-40|
Tìm số nguyên x biết :
a, ( x + 5 ) + ( x - 9 )= x + 2 b , ( 27 - x ) + (15 + x ) = x - 24
a, ( x + 5 ) + ( x - 9 )= x + 2
x + 5 + x - 9 = x + 2
x + x - x = 2 - 5 + 9
x = 6
Vậy x = 6
b , ( 27 - x ) + (15 + x ) = x - 24
27 - x + 15 + x = x - 24
- x + x - x = - 24 - 27 - 15
- x = -66
x = 66
Vậy x = 66
a, x+5+x-9 bằng x+2
2x - 4 bằng x+2
2x - x bằng 2+4
x bằng 6
b, 27-x+15+x bằng x-24
42 bằng x-24
x bằng 42+24
x bằng 66
mọi ng kết bạn vs mk ik
cùng nhau học tập nào
a, ( x + 5) + ( x - 9) = x + 2
<=> x + 5 + x - 9 = x + 2
<=> x + x - x = 2 - 5 + 9
<=> x = 6
Vậy_
b, ( 27 - x ) + ( 15 + x ) = x - 24
<=> 27 - x + 15 + x = x - 24
<=> -x + x - x = -24 - 27 - 15
<=> -x = -66
<=> x = 66
Vậy_
Tính bằng cách thuận tiện:
5 x 8 x 24 x 27 / 8 x 15 x 9 x 7
\(\frac{5x8x24x27}{8x15x9x7}=\frac{5x8x24x9x3}{8x5x3x9x7}=\frac{24}{7}\)
Chúc bạn học tốt.
😁😁😁
Ta tính thuận tiện bằng cách phân tích các thừa số để bỏ thừa số chung:
\(\frac{5\text{x}8\text{x}24\text{x}27}{8\text{x}15\text{x}9\text{x}7}=\frac{5\text{x}8\text{x}3\text{x}8\text{x}3\text{x}3\text{x}3}{8\text{x}3\text{x}5\text{x}3\text{x}3\text{x}7}\)
\(=\frac{8\text{x}3}{7}\)
\(=\frac{24}{7}\)