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OpenStudy (anonymous):
For the following system, if you isolated x in the second equation to use the Substitution Method, what expression would you substitute into the first equation? 2x + y = 9 −x − y = −8 A. -8 + y B. -8 – y C. 8 + y D. 8 - y
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OpenStudy (anonymous):
-x-y=-8 --> -x=-8-y --> x = 8+y
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