Answer:
x=8
y=21
Explanation:
9y-77+12x-28=180
9y+12x=285
7x+12=12x-28
5x=40
9y+96=285
9y=189
Answer: x = 8 y = 21
7x + 12 = 12x - 28
40 = 5x
x = 8
180 = 12(8-28) + 9y - 77
180 = 96 - 28 - 77 + 9y
180 = -9 + 9y
189 = 9y
y = 21
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