Write down the solution for this math problem: Solve -60 - 266 + 15 = -12*y - 47 for y.
answer: 22

Write down the solution for this math problem: Solve -21 = -16*r + 11 for r.
answer: 2

Write down the solution for this math problem: Solve 122068249*a - 122068180*a = -6417 for a.
answer: -93

Write down the solution for this math problem: Solve -148 - 133 = -43*x + 235 for x.
answer:
12