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Mathematics 7 Online
OpenStudy (anonymous):

For the following system, if you isolated x in the first equation to use the Substitution Method, what expression would you substitute into the second equation? −x + 2y = 9 4x + 5y = 9 A. −9 + 2y B. −9 − 2y C. 9 − 2y D. 9 + 2y

OpenStudy (anonymous):

a

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