Question:
Solve -84*r = -78*r + 60 for r..

Answer:
-10

Question:
Solve 39 - 135 = 8*n for n..

Answer:
-12

Question:
Solve -3*p + 110*p - 376*p - 8930 = 201*p for p..

Answer:
-19

Question:
Solve -225*j = -234*j - 9 for j..

Answer:
-1