Write down the solution for this math problem: Solve -62*a = -90*a - 252 for a.
answer: -9

Write down the solution for this math problem: Solve 23*w - 403 = -235 + 614 for w.
answer: 34

Write down the solution for this math problem: Solve -13*d - 9 = 17 for d.
answer: -2

Write down the solution for this math problem: Solve -77*r + 66*r - 66 = 0 for r.
answer:
-6