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OpenStudy (anonymous):
solve using substitution 7X-3Y=20 5X+3Y=16
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OpenStudy (lucaz):
isolate one of the variables in one equation and substitute on the other equation
OpenStudy (lucaz):
before you do that, you can add the equations and get 12x+0=36
OpenStudy (lucaz):
the x = 36/12 = 3 then you can substitute it on the equation
OpenStudy (anonymous):
Thanks I already figured it out though...l
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