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Larry Mata
Mathematics
26 August, 15:23
Y - x = 9 and 8 = - 2x - 4y
(solve for y)
+4
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Lincoln Hammond
26 August, 15:50
0
Y - x = 9
-x = 9 + y
x = - 9 - y
8 = - 2x - 4y
8 = - 2 (-9 - y) - 4y
8 = 18 + 2y - 4y
-10 = - 2y
10 = 2y
y = 5
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