Write down the solution for this math problem: Solve 21*l = 17*l - 38*l + 798 for l.
answer: 19

Write down the solution for this math problem: Solve -3624*d + 1555242 = 8622*d for d.
answer: 127

Write down the solution for this math problem: Solve 98*q + 37 = -23*q - 326 for q.
answer: -3

Write down the solution for this math problem: Solve 182 = 4*r + 154 for r.
answer:
7