SOLUTION: Where do the inequalities intersect in the problems 9x+8y <72 and-7x-4y <28

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Question 882452: Where do the inequalities intersect in the problems 9x+8y <72 and-7x-4y <28
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
9x%2B8y=72
-7x-4y=28
Multiply the second equation by 2 and add them together.
9x%2B8y-14x-8y=72%2B56
-5x=128
x=-128%2F5
.
.
Then,
9%28-128%2F5%29%2B8y=72
8y=360%2F5%2B1152%2F5
8y=1512%2F5
y=189%2F5