Tìm số nguyên x biết: 305-x+14=48+(x-23)
Tìm số nguyên x biết
a. x-43=(35-x)-48 ; b. 305-x=14=48=(x-23)
c. -(x-6+85)=(x+51)-54 , d. -(35-x)-(37-x)=33-x
ta co: 1 + 1 = 2 vi the nen em la cua anh haha
tìm x 305-x +14 = 48 +(x-23)
305 - x + 14 = 48 + x - 23
(=) -x - x = 48 - 23 - 305 - 14
(=) -2x = -294
(=) x = -294 : (-2)
(=) x = 147
tìm số nguyên x,biết:
x-43=(35-x)-48
(guips mình nha)
1,tìm x
a,305-x+14=48+(x-23)
b,-(35-x)-(37-x)=33-x
a, 305-x+14=48+x-23
<=> 319-x=25+x
<=>x=-147
b, -35+x-37+x=33-x
<=> -72+2x=33-x
<=> 2x+x=33+72
<=> 3x=105 <=> x=35
x+(-31)-(42)=-45
305-x+ 14 =48+(x-23)
x-43=(35-x)-48
\(x\) + (-31) - (42) = -45
\(x\) - (31 + 42) = -45
\(x\) - 73 = -45
\(x\) = -45 + 73
\(x\) = 28
305 - \(x\) + 14 = 48 + (\(x\) - 23)
(305 + 14) - \(x\) = (48 - 23) + \(x\)
319 - \(x\) = 25 + \(x\)
\(x\) + \(x\) = 319 - 25
2\(x\) = 294
\(x\) = 294 : 2
\(x\) = 147
\(x-43=\left(35-x\right)\) - 48
\(x\) - 43 = 35 - \(x\) - 48
\(x\) - 43 = - (48 - 35) - \(x\)
\(x\) - 43 = - 13 - \(x\)
\(x\) + \(x\) = -13 + 43
2\(x\) = 30
\(x\) = 30 : 2
\(x\) = 15
x + (-31) - 42 = -45
x - 73 = -45
x = -45 + 73
x = 28
-------
305 - x + 14 = 48 + (x - 23)
319 - x = 48 + x - 23
-x - x = 25 - 319
-2x = -294
x = -294 : (-2)
x = 147
--------
x - 43 = (35 - x) - 48
x = 35 - x - 48 + 43
x + x = 30
2x = 30
x = 30 : 2
x = 15
+ (-31) - (42) = -45
- (31 + 42) = -45
- 73 = -45
= -45 + 73
= 28
305 - + 14 = 48 + ( - 23)
(305 + 14) - = (48 - 23) +
319 - = 25 +
+ = 319 - 25
2 = 294
= 294 : 2
= 147
- 48
- 43 = 35 - - 48
- 43 = - (48 - 35) -
- 43 = - 13 -
+ = -13 + 43
2 = 30
= 30 : 2
= 15
305 - x + 14 = 48 + ( x - 23 )
=>-x-x=48-23-305-14
-2x=-294
=>2x=-294:2
x=147
Tìm x, biết:
a, 305 - x + 14 = 48 + ( x - 23 )
b, - ( 35 - x ) - ( 37 - x ) = 33 - x
a)
305 - x + 14 = 48 + (x - 23)
<=>319-x =48+x-23
<=>319-x=25+x
Chuyển vế đổi dấu, Ta có:
-2x=-294
<=>x=147
Vậy giá trị của x là 147
Còn câu b) thì mình chịu SORRY bạn nhé ! Chúc bạn học tốt .
\(a,305-x+14=48+\left(x-23\right)\)
\(\Leftrightarrow-x-x=48-23-14-305\)
\(\Leftrightarrow-2x=-294\)
\(\Leftrightarrow x=147\)
\(b,-\left(35-x\right)-\left(37-x\right)=33-x\)
\(\Leftrightarrow-35+x-37+x=33-x\)
\(\Leftrightarrow2x+x=33+35+37\)
\(\Leftrightarrow3x=105\)
\(\Leftrightarrow x=35\)
Tìm x, biết:
a, 305 - x + 14 = 48 + ( x - 23 )
<=>319-x=25+x
<=>x=-147
b, - ( 35 - x ) - ( 37 - x ) = 33 - x
<=>-72+2x=33-x
<=>2x+x=33+72
<=>3x=105
<=>x=35
3) tìm x thuộc z, biết
a) x-43=(35-x)-48
b) 305-x+14=48+(x-23)
c) -(-x -6+85)=(x+51)-54
d)-(35-x)-(37-x)= 33-x
a: \(x-43=\left(35-x\right)-48\)
=>\(x-43=35-x-48\)
=>\(x-43=-x-13\)
=>\(x+x=-13+43\)
=>2x=30
=>x=30/2=15
b: \(305-x+14=48+\left(x-23\right)\)
=>\(319-x=48+x-23=25+x\)
=>\(x+25=319-x\)
=>\(x+x=319-25\)
=>\(2x=294\)
=>\(x=\dfrac{294}{2}=147\)
c: \(-\left(-x-6+85\right)=\left(x+51\right)-54\)
=>\(-\left(-x+79\right)=x+51-54\)
=>x-79=x-3
=>-79=-3(vô lý)
=>\(x\in\varnothing\)
d: \(-\left(35-x\right)-\left(37-x\right)=33-x\)
=>\(-35+x-37+x=33-x\)
=>2x-72=-x+33
=>\(2x+x=33+72\)
=>3x=105
=>\(x=\dfrac{105}{3}=35\)
bài 1: Tìm số nguyên x , biết :
a) x - 43 = ( 35 -x ) -48 b) 305 - x + 14 = 48 + ( x -23 ) c) -( x - 6 + 85 ) = ( x - 51 ) - 54 d) - ( 35 - x ) - ( 37- x) = 33 - x
bài 2: Tìm số nguyên x , biết :
a) 13 - |x| = |-4| b) |x| - 3 + 6 = 16 c) 35 - | 2x - 1 | = 14 d) |3x -2 | + 5 = 9 - x
bài 3 : Tìm số nguyên x sao cho :
a) x - ( -25 + 7) > 12 - ( 15 - 14 ) b) | 17 + ( x - 15 ) | < 4
Tìm x \(\varepsilon\)Z biết :
a, x - 43 = ( 35 - x ) - 48
b, 305 - x + 14 = 48 + ( x - 23 )
c, ( x - 6 + 85 ) = ( x + 51 ) - 54
d, -( 35 - x ) - ( 37 - x ) = 33 - x
e, - 12. ( x - 5 ) + 7 . ( 3 - x ) = 5
f, 30. ( x+ 2 ) - 6 . ( x - 5 ) - 24 = 100
a, x - 43 = ( 35 - x ) - 48
\(x-43=35-x-48\)
\(x+x=35-48+43\)
\(2x=30\)
\(x=15\)
b, 305 - x + 14 = 48 + ( x - 23 )
\(305-x+14=48+x-23\)
\(-x-x=48-23-14-305\)
\(-2x=-294\)
\(x=147\)
c, ( x - 6 + 85 ) = ( x + 51 ) - 54
\(x-6+85=x+51-54\)
\(x-x=51-54-85+6\)
\(0=-82\)
\(x\in\varnothing\)
d, -( 35 - x ) - ( 37 - x ) = 33 - x
\(-35+x-37+x=33-x\)
\(x+x+x=33+37+35\)
\(3x=105\)
\(x=35\)
e, - 12. ( x - 5 ) + 7 . ( 3 - x ) = 5
\(-12x+60+21-7x=5\)
\(-12x-7x=5-21-60\)
\(-19x=-76\)
\(x=4\)
f, 30. ( x+ 2 ) - 6 . ( x - 5 ) - 24 = 100
\(30x+60-6x+30-24=100\)
\(30x-6x=100+24-30-60\)
\(24x=34\)
\(x=\frac{17}{12}\)
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