Question 876687
c+v=121 and c=1+4v.
Linear system and you want a solution for c.


v=121-c. Substitute and solve for c.
c=1-4(121-c)
c=1-4*121-(-4c)
c=1-484+4c
c-4c=1-484
-3c=-483
c=483/3
c=161