Answer:
x = -24
a = 11
Explanation:
So for the first one:

Multiply both sides of the equation by 12

Subtract 8x from both sides

Subtract 72 from both sides

Divide both sides by -11

And the second one...

Distribute the 2 to the (a - 2) and the 3 to (a - 5)

then add 15 to both sides

Subtract 2a from both sides
11 = a