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OpenStudy (anonymous):
systems of equations help: solve the systems of equations 3x+y=7 x+3y=-3
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OpenStudy (anonymous):
find x in terms of y from second equation and put it in first
OpenStudy (anonymous):
3x for both?
OpenStudy (anonymous):
x in terms of y in second eqn is -3-3y now put this in place of x in first equation
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