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OpenStudy (anonymous):
solve each system. Explin why you chose the method you used. 2x+7y= -20 y=3x+7
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OpenStudy (anonymous):
Used substitution for this, they tell you y = 3x+7, so plug that into the "y" in 2x+7y=20
OpenStudy (anonymous):
ok
OpenStudy (anonymous):
So, 23x=-69, Solve for x and then substitute it back to the equation for y
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