Hi Mary,
To find y, we have to get rid of the x's. So let's multiply the first equation by 2 and then subtract the second equation from the first equation. . .
4X + 8Y = 4
-(4X + Y = 18)
-------------------
7Y = -14
Y = -2
Dan
Mary S.
asked • 11/27/15Find y if 2x + 4y=2 and 4x+y=18
Find y if 2x+4y=2 and 4x+y=18
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