Question:
Solve -33 + 42 = 9*r for r..

Answer:
1

Question:
Solve -68*j = -977 + 229 for j..

Answer:
11

Question:
Solve d + 25 = -d + 9 for d..

Answer:
-8

Question:
Solve -396 = -19*a - 5*a + 300 for a..

Answer:
29