Write down the solution for this math problem: Solve 2399*a - 476 = 1170*a + 1222*a for a.
answer: 68

Write down the solution for this math problem: Solve 2*s = 43 - 35 for s.
answer: 4

Write down the solution for this math problem: Solve -187*i - 172*i = -513 - 564 for i.
answer: 3

Write down the solution for this math problem: Solve -37*q = -12*q + 225 for q.
answer:
-9