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OpenStudy (anonymous):
solve by the substitution method 5x + 5y = 20, -3x + y = 12
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OpenStudy (anonymous):
-3x + y = 12 y = 12 + 3x substitue y = 12 + 3x into 5x + 5y = 20 and solve
OpenStudy (anonymous):
? not sure
OpenStudy (anonymous):
not sure about what
OpenStudy (anonymous):
you typed sub y = 12 + 3x into 5x + 5y =20 what am i substituting?
OpenStudy (anonymous):
you know that y equals 12 + 3x In this equation there's a y 5x + 5y =20
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OpenStudy (anonymous):
got it. thanks
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