Question:
Solve 7*r + 974 = -982 + 2026 for r..

Answer:
10

Question:
Solve 1012 + 1053 = -9*d + 1912 for d..

Answer:
-17

Question:
Solve -4*s + 13*s - 46*s = -259 for s..

Answer:
7

Question:
Solve 150894 = 40*m + 149934 for m..

Answer:
24