Question:
Solve 7*d + 6*d = 26 for d..

Answer:
2

Question:
Solve 278*y = 17*y - 3393 for y..

Answer:
-13

Question:
Solve -483 = 4*d - 15*d - 10*d for d..

Answer:
23

Question:
Solve 18*v - 5 = 13*v for v..

Answer:
1