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OpenStudy (anonymous):
solve the system using elemination 4x+2y=8 2x-2y=4
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OpenStudy (solomonzelman):
4x+2y=8 2x-2y=4 ----> times (-2) ----> -4x+4y=-8 4x +2y = 8 -4x +4y = -8 ----------------- ADD THEM.
OpenStudy (anonymous):
how!
OpenStudy (solomonzelman):
4x +2y = 8 -4x +4y = -8 ----------------- (4-4)x + (2+4)y = (8-8) 0x + 6y = 0 we got rid of x, 6y=0 y=0 can you find x?
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