x:3*48+x:4*36=1500
tìm x
x : 3 x 48 + : 4 x 36 = 1500. Giá trị của là:
Tim x la phan tu cua N biet
a ) ( x - 5 ) x 4 = 36
b) ( 48 - x ) x 2 = 14
c) ( 2 x X - 3 ) x 5 = 4
d) 1 + 3 + 5 +..........+ X = 36
e) 1 + 2 + 3 + ...........+ X = 55 + 6 +.....+ 2X = 110
c, (2\(\times\) \(x\) - 3) \(\times\) 5 = 4
2 \(\times\) \(x\) - 3 = \(\dfrac{4}{5}\)
2 \(\times\) \(x\) = 0,8 + 3
2\(x\) = 3,8
\(x\) = \(3,8\) : 2
\(x\) = 1,9
d, 1 + 3 + 5 +....+\(x\) = 36
(\(x\) + 1)\(\times\) \(x\): 2 = 36
(\(x+1\)) \(\times\)\(x\) = 72
(\(x+1\))\(\times\)\(x\) = 8 x 9
\(x\) = 8
a) (X - 5) x 4 = 36
⇒ X - 5 = 36 : 4
⇒ X - 5 = 9
⇒ X = 9 + 5
⇒ X = 14
Vậy X = 14
b) (48 - X) x 2 = 14
⇒ 48 - X = 14 : 2
⇒ 48 - X = 7
⇒ X = 48 - 7
⇒ X = 41
Vậy X = 41
Tính nhẩm:
7 x 3 = ............... 6 x 4 = ............... 5 x 6 = ................ 6 x 7 = ..............
49 : 7 = .............. 36 : 6 = ............... 28 : 7 = ............... 48 : 6 = .............
7 x 3 = 21 6 x 4 = 24 5 x 6 = 30 6 x 7 = 42
49 : 7 = 7 36 : 6 = 6 28 : 7 = 4 48 : 6 = 8
tim so tu nhien x , biet
a, 5x - x = 29 - 36 : 4
b, ( 3x - 48 ) . 6 = 3 mu 3 . 2 mu 2 + 2 mu 3 . 3 mu 2 - 12 mu 2
c, x thuoc B(6) va 22 < x < hoac = 36
a) \(\Leftrightarrow4x=20\Leftrightarrow x=5\)
b) \(\Leftrightarrow18x-288=27.4+8.9-144\)
\(\Leftrightarrow18x=108+72-144+288=324\)
\(\Leftrightarrow x=18\)
c)Ta có:
\(x\in B\left(6\right)\) và \(22< x\le36\)
mà \(B\left(6\right)=\left\{0;6;12;18;24;30;36;42;48;...\right\}\)
\(\Rightarrow x\in\left\{0;6;12;18;24;30;36;42;48;...\right\}\) và \(22< x\le36\)
\(\Rightarrow x\in\left\{24;30;36\right\}\)
Vậy \(x\in\left\{24;30;36\right\}\)
Tìm x:
a) 42 : x + 36 : x = 6 b) 90 : x – 48 : x = 3
Tìm x thuộc Z,biết:
a) -152–(3x+1)=(-2).(-3)3
b) x–43=(35–x)-48
c) |5x + 1| =11
d) 4(x +1) –(3x +1)= 14
e) [48+ ( x –3)3] .2 =80
f) ( 2x +7)2 = 36
a) -152 - (3x + 1) = (-2).(-3)3
-152 - 3x - 1 = (-2).(-27)
-3x - 153 = 54
-3x = 54 + 153
-3x = 207
x = -69
b) x - 43 = (35 - x) - 48
x - 43 = 35 - x - 48
x - 43= -x - 13
x = -x - 13 + 43
x = 30 + x
x + x = 30
2x = 30
x = 15
\(\frac{3}{4}x\frac{8}{9}x\frac{15}{16}x\frac{24}{25}x\frac{35}{36}x\frac{48}{49}x\frac{63}{64}\)
Tính giá trị biểu thức
\(\frac{3}{4}.\frac{8}{9}.\frac{15}{16}.\frac{24}{25}...\frac{63}{64}\)
\(=\frac{1.3}{2.2}.\frac{2.4}{3.3}.\frac{3.5}{4.4}.\frac{4.6}{5.5}...\frac{7.9}{8.8}\)
\(=\frac{1.3.2.4.3.5.4.6...7.9}{2.2.3.3.4.4.5.5...8.8}\)
\(=\frac{1.9}{2.8}=\frac{9}{16}\)
a] 4 * x-17=3
b] 8*x-3=0
c] 124+[118-x]=217
d] 156- [x+61]=82
đ] x-32:16=48
e] [x-32]:16=48
bài 2 tìm x
a] 3636: [ 12*x-91]=36
b] x-13,4*5 =2,56
c] [ x:3-4] *5 =15
* là dấu nhân nhé
mn dúp em nhé
a) 4x=20
x=5
b) 8x=3
x=3/8
c) 118-x=93
x=25
d) x+61=74
x=13
đ)x-2=48
x=50
e) x-32=768
x=800
bài 2:
a) 12x-91=101
x=16
b) x-67=2,56
x=69,56
c) x:3-4=3
x=21
Bài 1. Tìm x
a) 4 * x - 17 = 3
=> 4x = 20
=> x = 5
b) 8 * x - 3 = 0
=> 8x = 3
=> x = \(\frac{3}{8}\)
c) 124 + (118 - x) = 217
=> 118 - x = 90
=> x = 28
d) 156 - (x + 61) = 82
=> x + 61 = 74
=> x = 13
đ) x - 32 : 16 = 48
=> x - 2 = 48
=> x = 50
e) (x - 32) : 16 = 48
=> x - 32 = 768
=> x = 800
Bài 2. Tìm x
a) 3636 : (12 * x - 91) = 36
=> 12x - 91 = 101
=> 12x = 192
=> x = 16
b) x - 13,4 * 5 = 2,56
=> x - 67 = 2,56
=> x = 69,56
c) (x : 3 - 4) * 5 = 15
=> x : 3 - 4 = 3
=> x : 3 = 7
=> x = 21
~Study well~
#KSJ
tim x
42:x+36:x=66
90:x-48:x=3
a) (42+36):x=66
78:x=66
x=78:66
x=13/11
b) 90:x-48:x=3
(90-48):x=3
42:x=3
x=42:3
x= 14
a) 42:x+36:x=66
42.1/x+36.1/x=66
1/x.(42+36)=66
1/x=11/13
x=1:11/13
x=13/11
b) 90:x-48:x=3
90.1/x-48.1/x=3
1/x(90-48)=3
1/x=1/14
x=14