Write down the solution for this math problem: Solve -24*f - 90 = -42 for f.
answer: -2

Write down the solution for this math problem: Solve a - 2*a + 5 = 0 for a.
answer: 5

Write down the solution for this math problem: Solve -296*p - 7 = -289*p for p.
answer: -1

Write down the solution for this math problem: Solve -424*r = -404*r + 200 for r.
answer:
-10