Write down the solution for this math problem: Solve 702*x - 706*x = -28 for x.
answer: 7

Write down the solution for this math problem: Solve 2134 = -52*l + 40*l - 85*l for l.
answer: -22

Write down the solution for this math problem: Solve -81*s + 396 = 15*s - 60*s for s.
answer: 11

Write down the solution for this math problem: Solve -150 = -72*c - 78 for c.
answer:
1