10-2(4-3x)=-4
<=>10-8+6x=-4
<=>2+6x=-4
<=>6x=-6
<=>x=-1
Vậy x=-1
3 -12+3(-x+7)=-18
<=> 3-12-3x+21=-18
<=>12-3x=-18
<=>3x=30
<=>x=10
Vậy x=10
\(10-2\left(4-3x\right)=4\Leftrightarrow10-\left(8-6x\right)=4\)
\(\Leftrightarrow8-6x=10-4=6\Leftrightarrow6x=8-6=2\Leftrightarrow x=\frac{2}{6}=\frac{1}{3}\)
\(3-12+3\left[\left(-x\right)+7\right]=-18\Leftrightarrow\left(-9\right)+\left(-3x\right)+21=18\)
\(\Leftrightarrow\left(-3x\right)+12=18\Leftrightarrow-3x=18-12=6\Leftrightarrow x=6\div\left(-3\right)=-2\)
\(4.24\div\left(3x-2\right)=-3\Leftrightarrow96\div\left(3x-2\right)=-3\Leftrightarrow3x-2=96\div\left(-3\right)=-32\)
\(\Leftrightarrow3x=\left(-32\right)+2=-30\Leftrightarrow x=\left(-30\right)\div3=-10\)
10 - 2(4 - 3x) = -4
2(4 - 3x) = 10 - (-4)
2(4 - 3x) = 14
4 - 3x = 14 : 2
4 - 3x = 7
3x = 4 - 7
3x = -3
x = -3 : 3
x = -1
3 - 12 + 3(-x + 7) = -18
-9 + 3(-x + 7) = -18
3(-x + 7) = -18 - (-9)
3(-x + 7) = -9
-x + 7 = -9 : 3
-x + 7 = -3
-x = -3 - 7
-x = -10
còn câu thứ 3 thì mình phát hiện sai đề bài nên ko làm nhé! hehe!