Question:
Solve 42*r - 11*r = 12*r - 703 for r..

Answer:
-37

Question:
Solve 0 = -12*w + 3*w + 45 for w..

Answer:
5

Question:
Solve 0 = -w - 9*w - 30 for w..

Answer:
-3

Question:
Solve 9 = t + 8 for t..

Answer:
1