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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?
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OpenStudy (anonymous):
A. 9 - x B. y - 9/2 C. 9 - 2y D. 1/2 y + 9
OpenStudy (anonymous):
solve the first equation for x x = 9 - 2y
OpenStudy (anonymous):
I am Here :)
OpenStudy (anonymous):
Answer C. 9 - 2y
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