2p+54q=1080 where p = dollars / bicycle and q is the number of bicycles

Question

If the supply function for the bicycle is p-38q=280 find the equilibrium point of (q,p)

Answer 1

Solve the two equations simulateously

2p + 54q = 1080
p - 38q = 280

Double the last equation and subtract from the first equation to get q

2p - 76q = 560
130q = 520
etc