Question 1017622
From these two equations,
m=3+2p
5m-2p=-1
substitute the first into the second and get
5(3+2p) - 2p = -1
15 + 10p - 2p = -1
15 + 8p = -1
8p = -16
p = -2
m = 3 + 2(-2) = -1