Write down the solution for this math problem: Solve 7 = 2*r + 5 for r.
answer: 1

Write down the solution for this math problem: Solve 11*b - 122 + 56 = 55 for b.
answer: 11

Write down the solution for this math problem: Solve -4*l - 18 = 2 for l.
answer: -5

Write down the solution for this math problem: Solve 9 = 2*w + 7*w for w.
answer:
1