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OpenStudy (anonymous):
I need to solve the following system of equation 5x - y = 12 x = 12 - 3y I got y = 72/11 (simplified to y = 36/7) but it doesn't seem to work when I plug it in... am I doing something wrong?
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OpenStudy (solomonzelman):
Use substitution plug in x = 12 - 3y for x into the 1st equation.
OpenStudy (solomonzelman):
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