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a) \(x-2=-6\)
\(x=-6+2\)
\(x=-4\)
b) \(15-\left(x-7\right)=-21\)
\(x-7=36\)
\(x=43\)
c) \(4.\left(3x-4\right)-2=18\)
\(4\left(3x-4\right)=20\)
\(3x-4=5\)
\(3x=9\)
\(x=3\)
d) \(\left(3x-6\right)+3=32\)
\(3x-6=29\)
\(3x=29+6\)
\(3x=35\)
\(x=\frac{35}{3}\)
e) \(\left(3x-6\right).3=32\)
\(3x-6=\frac{32}{3}\)
\(3x=\frac{32}{3}+6\)
\(3x=\frac{50}{3}\)
\(x=\frac{50}{9}\)
f) \(\left(3x-6\right):3=32\)
\(3x-6=96\)
\(3x=102\)
\(x=34\)
g) \(\left(3x-6\right)-3=32\)
\(3x-6=35\)
\(3x=41\)
\(x=\frac{41}{3}\)
h) \(\left(3x-2^4\right).7^3=2.7^4\)
\(\left(3x-2^4\right)=2.7=14\)
\(\left(3x-16\right)=14\)
\(3x=14+16=30\)
\(x=10\)
i) \(\left|x\right|=\left|-7\right|\)
\(\left|x\right|=7\)
\(\Rightarrow\orbr{\begin{cases}x=7\\x=-7\end{cases}}\)
k) \(\left|x+1\right|=2\)
\(\Rightarrow\orbr{\begin{cases}x+1=2\\x+1=-2\end{cases}\Rightarrow\orbr{\begin{cases}x=1\\x=-3\end{cases}}}\)
l) \(\left|x-2\right|=3\)
\(\Rightarrow\orbr{\begin{cases}x-2=3\\x-2=-3\end{cases}\Rightarrow\orbr{\begin{cases}x=5\\x=-1\end{cases}}}\)
m) \(x+\left|-2\right|=0\)
\(x+2=0\)
\(x=-2\)
o) \(72-3\left|x+1\right|=9\)
\(3\left|x-1\right|=63\)
\(\left|x-1\right|=21\)
\(\Rightarrow\orbr{\begin{cases}x-1=21\\x-1=-21\end{cases}\Rightarrow\orbr{\begin{cases}x=22\\x=-20\end{cases}}}\)
p) Ta có: \(\left|x-1\right|=3\)
\(\Rightarrow\orbr{\begin{cases}x-1=3\\x-1=-3\end{cases}}\)
mà \(x+1< 0\)
\(\Rightarrow x-1=-3\)
\(\Rightarrow x=-2\)
q) \(\left(x-2\right)\left(x+4\right)=0\)
\(\Rightarrow\orbr{\begin{cases}x-2=0\\x+4=0\end{cases}\Rightarrow\orbr{\begin{cases}x=2\\x=-4\end{cases}}}\)
hok tốt!!


\(32:\left(3x-2\right)=2^3\\ \Leftrightarrow32:\left(3x-2\right)=8\\ \Leftrightarrow3x-2=\frac{32}{8}\\ \Leftrightarrow3x-2=4\\ \Leftrightarrow3x=4+2\\ \Leftrightarrow3x=6\\ \Leftrightarrow x=\frac{6}{3}\\ \Leftrightarrow x=2\)
Vậy \(x=2\)

\(\left(3x-2\right)^3=2.32\)
\(=>\left(3x-2\right)^3=64\)
\(=>\left(2x-3\right)^3=4^3\)
\(=>2x-3=4\)
\(=>2x=7\)
\(=>x=\frac{7}{2}\)
Ủng hộ nha
\(\left(3x-2\right)^3=2.32\)
\(\left(3x-2\right)^3=64\)
Cách 1: \(3x-2=\sqrt[3]{64}\)(cách này lớp 7)
\(3x-2=4\)
\(3x=4+2\)
\(3x=6\)
\(\Rightarrow x=6:3=2\)
Cách 2:
\(\Rightarrow4^3=64\)
\(\Rightarrow3x-2=4\)
(giải y như cách trên)

b, 3x . 3 = 81
3x = 81 : 3
3x = 27
x = 27 : 3
x = 9
~~~Hok tốt~~~
Bn tích cho mik nha

a) -45 : ( 3x - 17 ) = 32
3x - 17 = -45 : 9
3x - 17 = -5
3x = 12
x = 4
b) \(\left(2x-8\right)\left(-2x\right)=0\)
\(\Rightarrow\orbr{\begin{cases}2x-8=0\\-2x=0\end{cases}}\)
\(\Rightarrow\orbr{\begin{cases}x=4\\x=0\end{cases}}\)
Vậy.....

3. ( 3 x - 9 ) = 81
3 x - 9 = 81 : 3
3 x - 9 = 27
3 x = 27 + 9
3 x = 36
x = 36 : 3
x = 12
[( 6 x - 32 ) : 2 + 56 ] . 14 = 2814
( 6 x - 32 ) : 2 + 56 = 2814 : 14
( 6 x - 32 ) : 2 = 201 - 56
6 x - 32 = 145. 2
6 x = 290 + 32
x = 322 : 6
dư nha bạn

a, 2x -(-17) = 15
2x + 17 = 15
2x = 15 - 17
2x =(-2)
x = (-2) : 2
x = (-1)
\(32:\left(3x-2\right)=8\)
\(\left(3x-2\right)=32:8\)
\(3x-2=4\)
\(3x=4+2\)
\(3x=6\)
\(x=6:3=2\)
~GOOD STUDY~
\(2^5:\left(3x-2\right)=2^3\)
\(\Rightarrow3x-2=2^2=4\)
\(\Rightarrow3x=6\)
\(\Rightarrow x=2\)
học tốt^^