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OpenStudy (rayford):
x+2y=10 x-y=4 use substituion
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OpenStudy (anonymous):
y=2 x=6
OpenStudy (anonymous):
Substitution means to solve for x or y in one equation and then plug into the second one. Here, you might do x = 4+y then plug into the first equation 4 + y + 2y = 10
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