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Mathematics 11 Online
OpenStudy (anonymous):

When solving the system x + 2y = 9 and x - y = 6, which expression could be substituted for x in the second equation? A. 9 - x B. y - 9/2 C. 9 - 2y D. 1/2 y + 9

OpenStudy (anonymous):

Isolate x in the first equation, then substitute it into the second. x + 2 y = 9 x = 9 - 2y Plug that into the second equation for x and solve. :D

OpenStudy (anonymous):

Thanks

OpenStudy (anonymous):

no prob

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