A)2x -7 = -1
2x=-1+7
2x=8
x=4
B)3x+ 8 =1
3x=1+8
3x=9
x=3
C) 1/2x+8=10
1/2x=10-8
1/2x=2
x=1
D)
\(\frac{1}{2} (2x-6)=-6 \\ \\ \frac{2x}{2} - \frac{6}{2}=-6 \\ \\ \frac{2x}{2} - \frac{6}{2}=-12 \\ \\ 2x-6=-12 \\ \\ 2x=-12+6 \\ \\ 2x=-6 \\ \\ \boxed{x=-3}\)
