Question:
Solve 2080*r = 2045*r + 315 for r..

Answer:
9

Question:
Solve -41*s + 475 - 188 = 0 for s..

Answer:
7

Question:
Solve -1237 - 1115 - 854 = 119*r - 945 for r..

Answer:
-19

Question:
Solve 0 = -16*q - 126781 + 126541 for q..

Answer:
-15