Question:
Solve 0 = 4*d - 70 + 78 for d..

Answer:
-2

Question:
Solve 12*p + 18 = 42 for p..

Answer:
2

Question:
Solve -328*m + 695*m - 320*m - 658 = 0 for m..

Answer:
14

Question:
Solve 66*d - 63*d - 12 = 0 for d..

Answer:
4