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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. 1/2y+9
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OpenStudy (anonymous):
c. 9-2y just re arrange the first equation to find x on its own,this is what you are asked to find to sub it into the second equation
OpenStudy (anonymous):
thank you (:
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