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a)[(x+32)+17] :2=42
(x+32)+17=42.2
(x+32)+17=84
x+32=84-17
x+32=67
x=67-32
x=35
b)[61+(53-x)]:17=1785
61+(53-x)=1785.17
61+(53-x)=10345
53-x=30345-61
53-x=30284
x=53-30284
x=-30231
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[(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
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a) 420 + 65 . 4 = ( x + 175 ) : 5 + 30
680 = ( x + 175 ) : 5 + 30
( x + 175 ) : 5 = 680 - 30
( x + 175 ) : 5 = 650
x + 175 = 650 . 5
x + 175 = 3250
x = 3250 - 175
x = 3075
Những câu sau làm giống vậy
a.420 + 65 . 4 = ( x + 175 ) : 5 + 30
680 = ( x + 175 ) : 5 + 30
( x + 175 ) : 5 = 680 - 30
( x + 175 ) : 5 = 650
x + 175 = 650 x 5
x + 175 = 3250
x = 3250 - 175
x = 3075
[ ( 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
b. ( 32 . 15 ) : 2 = ( x + 70) : 14 - 40
240 = ( x + 70 ) : 14 - 40
( x + 70 ) : 14 = 240 + 40
( x + 70 ) : 14 = 280
( x + 70 ) = 280 . 14
x + 70 = 3820
x = 3920 - 70
x = 3850
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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) \(\left[\left(x^2+54\right)-32\right]:2=61\)
\(\left(x^2+54\right)-32=61.2\)
\(\left(x^2+54\right)-32=122\)
\(x^2+54=122+32\)
\(x^2+54=154\)
\(x^2=154-54\)
\(x^2=100\)
\(x^2=10^2\)
\(x=10\)
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Bài 1
a) 76 x 54 + 2 x 27 x 23 + 54 = 76 x 54 + 54 x 23 + 54 = 54 x (76 + 23 + 1) = 54 x 100 = 5400
b) 17 x 82 - 17 x 32 = 17 x (82 - 32) = 17 x 50 = 850
Bài 2
28 - (x + 3) = 14
x + 3 = 28 - 14
x + 3 = 14
x = 14 - 3
x = 11
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[(x^2+54)-32]*2=244
(x^2+54)-32=244/2
(x^2+54)-32=122
x^2+54=122+32
x^2+54=154
x^2=154-54
x^2=100
=> x=10 hoặc x=-10
[(x2+54)-32]*2=244
(x2+54)-32=244/2
(x2+54)-32=122
x2+54=122+32
x2+54=154
x2=154-54
x2=100=102
=>x=10
![](https://rs.olm.vn/images/avt/0.png?1311)
\(a)88-3(7+x)=64\) \(c)[(x+32)-17]\div2=42\)
\(\Rightarrow3(7+x)=88-64\) \(\Rightarrow(x+32)-17=42.2\)\(\Rightarrow x+32-17=84\)
\(\Rightarrow3(7+x)=24\) \(\Rightarrow x=84+17-32\)
\(\Rightarrow7+x=24\div3\) \(\Rightarrow x=69\)
\(\Rightarrow7+x=8\)
\(\Rightarrow x=8-7\)
\(\Rightarrow x=1\)
\(b)131.x-941=2^7.2^3\) \(d)[(x^2+54)-32]\div2=61\)
\(\Rightarrow131.x-941=2^{10}\) \(\Rightarrow(x^2+54)-32=61.2\)
\(\Rightarrow131.x=1024+941\) \(\Rightarrow x+54-32=122\)
\(\Rightarrow131.x=1965\) \(\Rightarrow x=122+32-54\)
\(\Rightarrow x=1965\div131\) \(\Rightarrow x=100\)
\(\Rightarrow x=15\)
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
![](https://rs.olm.vn/images/avt/0.png?1311)
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
giải oy pn **** giùm mk nka
a. X = 6
b. X = 9
c. X = 10