Question:
Solve -177 = 2*r - 167 for r..

Answer:
-5

Question:
Solve -842*i = 2919*i - 240704 for i..

Answer:
64

Question:
Solve -172*x + 12979 = 17279 for x..

Answer:
-25

Question:
Solve 10426 - 32734 = 647*l + 158*l + 209*l for l..

Answer:
-22