Write down the solution for this math problem: Solve -42*x = 160 + 386 for x.
answer: -13

Write down the solution for this math problem: Solve 84 = -2*r + 70 for r.
answer: -7

Write down the solution for this math problem: Solve -27*y + 28*y - 5 = 0 for y.
answer: 5

Write down the solution for this math problem: Solve 2*g - 129 = -135 for g.
answer:
-3