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a)131.x-941=32
131x=32+941=973
x=973:131
=973/131
b.88-(7+x).3=64
(7+x).3=88-64=24
7+x=24:3=8
x=8-7
x=1
c)51+(26-3x):5=55
(26-3x):5=55-51=4
26-3x=4.5=20
2x=26-20=6
x=6:3=2
a) 131 . x - 941 = 32
131 . x = 32 + 941
131 . x = 973
x = 973 : 131
x = 973/131
a) \(88-3\cdot\left(7+x\right)=64\)
\(3\cdot\left(7+x\right)=88-64=24\)
\(7+x=\frac{24}{3}=8\)
\(x=8-7=1\)
b) \(\left[\left(x+32\right)-17\right]\cdot2=42\)
\(\left(x+32\right)-17=\frac{42}{2}=21\)
\(x+32=21+17=38\)
\(x=38-32=6\)
c) \(\left[\left(x^2+54\right)-32\right]:2=61\)
\(\left(x^2+54\right)-32=61\cdot2=122\)
\(x^2+54=122+32=154\)
\(x^2=154-54=100\)
\(\Rightarrow x=\sqrt{100}=10\)
a) \(88-3.\left(7+x\right)=64\)
\(3.\left(7+x\right)=88-64\)
\(21+3x=24\)
\(3x=3\)
\(x=1\)
b) \(\left[\left(x+32\right)-17\right].2=42\)
\(\left(x+32\right)-17=42:2\)
\(\left(x+32\right)-17=21\)
\(x+32=21+17\)
\(x+32=38\)
\(x=38-32=6\)
c) \(\left[\left(x^2+54\right)-32\right]:2=61\)
\(\left(x^2+54\right)-32=61.2\)
\(\left(x^2+54\right)-32=122\)
\(x^2+54=122+32\)
\(x^2+54=154\)
\(x^2=154-54\)
\(x^2=100\)
\(x^2=10^2\)
\(x=10\)
a) => (x+32) - 17 = 42:2 = 21
=> x+32 = 21+17 = 38
=> x=38-32=6
b) => 61+(53-x) = 1785:17=105
=> 53-x = 105-61=44
=> x = 53-44 =9
c) => x^2 +54 -32 = 244:2 = 122
=> x^2 +22 = 122
=> x^2 = 122-2=100
=> x= 10 hoặc -10
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a) (x - 140) : 7 = 33 - 23 . 3
(x - 140) : 7 = 27 - 8 . 3 = 27 - 24 = 3
x - 140 = 3 x 7 = 21
x = 21 + 140 = 161
b) x3 . x2 = 28 : 23
x5 = 25
=> x = 2
c) (x + 2) . ( x - 4) = 0
x = -2 hoặc 4
d) 3x-3 - 32 = 2 . 32 =
3x-3 - 9 = 2 . 9 = 18
3x-3 = 18 + 9 = 27
3x-3 = 33
=> x - 3 = 3
x = 3 + 3 = 6
1) Tim x biet :
a) 88 - 3 ( 7 + x ) = 64 b) 131 . x - 941 = 27 . 23 c) [ ( x + 32 ) - 17 ] . 2 = 42 d) [ ( x2 + 54 ) - 32 ] : 2 = 61
3(7+x)=88-64 131 . x - 941=1024 [ ( x + 32 ) - 17 ] =42:2 [ ( x2 + 54 ) - 32 ]=61x2
3(7+x)=24 131.x=1024+941 [ ( x + 32 ) - 17 ] =21 [ ( x2 + 54 ) - 32 ]=122
7+x=24:3 131.x=1965 x+32=21+17 x2 + 54 =122+32
7+x=8 x=1965:131 x+23=38 x2 + 54 =154
x=8-7 x=15 x=38-23 x2 =154-54
x=1 x=15 x2=100
x=10 hoặc x= -10
[(x + 32) - 17] . 2 = 42
(x + 32) - 17 = 42 : 2
(x + 32) - 17 = 21
x + 32 = 21 + 17
x + 32 = 38
x = 38 - 32
x = 6
Vậy x = 6
\(a)88-3(7+x)=64\) \(c)[(x+32)-17]\div2=42\)
\(\Rightarrow3(7+x)=88-64\) \(\Rightarrow(x+32)-17=42.2\)\(\Rightarrow x+32-17=84\)
\(\Rightarrow3(7+x)=24\) \(\Rightarrow x=84+17-32\)
\(\Rightarrow7+x=24\div3\) \(\Rightarrow x=69\)
\(\Rightarrow7+x=8\)
\(\Rightarrow x=8-7\)
\(\Rightarrow x=1\)
\(b)131.x-941=2^7.2^3\) \(d)[(x^2+54)-32]\div2=61\)
\(\Rightarrow131.x-941=2^{10}\) \(\Rightarrow(x^2+54)-32=61.2\)
\(\Rightarrow131.x=1024+941\) \(\Rightarrow x+54-32=122\)
\(\Rightarrow131.x=1965\) \(\Rightarrow x=122+32-54\)
\(\Rightarrow x=1965\div131\) \(\Rightarrow x=100\)
\(\Rightarrow x=15\)
A) 88-3(7+x)=64
3(7+x)=88-64
3(7+x)=24
7+x=24:3
7+x=8
X=8-7
X=1