Answer:
Step-by-step explanation:
Well you only want the two equations so here they are.
x + y = -7
5*x + y = 1
I should give you the answer.
x = 2
y = -9 I think. These answers were done in my head.
(3,-2)
x = 14
2x = 28
6x = 84
6x = 180 - 124 + 2x
4x = 56
Answer:$2.71 per gallon