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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
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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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