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OpenStudy (anonymous):
2x+4y=28 x-2y=10 using addition
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OpenStudy (anonymous):
x = 12 y = 1
OpenStudy (anonymous):
time (2) x-2y=10 you get 2x-4y=20 2x-4y=20 2x+4y=28 Add --------- 4x= 48 x=48/4 x=12 Substitution x=12 find y 2x+4y=28 2(12)+4y=28 24 + 4y = 28 4y= 28-24 y = 4/4 y=1
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