第72页

信息发布者:
B
D
​$x=-11$​
​$-3$​
解:
$\begin{aligned}2(x - 3)&=-1\\2x - 6&=-1\\2x&=-1 + 6\\2x&=5\\x&=\frac{5}{2}\end{aligned}$
解:
$\begin{aligned}-3(x - 3)&=-5\\-3x + 9&=-5\\-3x&=-5 - 9\\-3x&=-14\\x&=\frac{14}{3}\end{aligned}$
解:
$\begin{aligned}4 - 3(x - 3)&=x + 10\\4 - 3x + 9&=x + 10\\-3x - x&=10 - 4 - 9\\-4x&=-3\\x&=\frac{3}{4}\end{aligned}$
解:
$\begin{aligned}7 - 3(x + 1)&=2(4 - x)\\7 - 3x - 3&=8 - 2x\\-3x + 2x&=8 - 7 + 3\\-x&=4\\x&=-4\end{aligned}$