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3x+4y=2 4x-4y=12 by using elimination

Sagot :

(+3x+4y=2)
(+4x-4y=12)
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7x = 14
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7
X=2

3(2)+4y=2
6+4y=2
4y=-4
Y=-1.
Or you can plug x into the other equation.

4(2)-4y=12
8-4y=12
-4y=4
Y=-1.

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