Answer:
x= -20, y= -2
Explanation:
x = -20, y = -2
8y - x = 4
x = 8y - 4
2x - 21y = 2
2(8y - 4) - 21y = 2
16y - 8 - 21y = 2
-5y = 10
y = -2
x = 8(-2) - 4
x = -20
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