Bài 4: Tìm x
a. \(\left(2x-5\right)+17=6\)
\(2x-5=6-17\)
\(2x-5=-11\)
\(2x=-11+5\)
\(2x=-6\)
\(x=-3\)
b.\(10-2\left(4-3x\right)=-4\)
\(-2\left(4-3x\right)=-4-10\)
\(-8+6x=-14\)
\(6x=-6\)
\(x=-1\)
c. \(-12+3\left(-x+7\right)=-18\)
\(3\left(-x+7\right)=-18+12\)
\(-3x+21=-6\)
\(-3x=-27\)
\(x=9\)
d.\(24:\left(3x-2\right)=-3\)
\(24:\left(-3\right)=3x-2\)
\(-8=3x-2\)
\(-6=3x\)
\(x=-2\)