Question:
Solve 7*y + 14 = 5*y + 20 for y..

Answer:
3

Question:
Solve -4*b = -8 - 0 for b..

Answer:
2

Question:
Solve 13*c - 18*c = 20 for c..

Answer:
-4

Question:
Solve -15*t + 14*t + 1 = 0 for t..

Answer:
1