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

Write down the solution for this math problem: Solve 4 = 10*l - 9*l for l.
answer: 4

Write down the solution for this math problem: Solve 0 = 228*n + 22*n - 3250 for n.
answer: 13

Write down the solution for this math problem: Solve -11*r + 39 = 6*r - 114 for r.
answer:
9