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Mathematics 7 Online
OpenStudy (anonymous):

what would be the ordered pair for the following system: 7r-6s =2 6r + 7s = 111

OpenStudy (watchmath):

Multiply the first equation by -6 and the second by 7 to get -42r+36s=-12 42r+49s+777 Add the two equations we get 85s=765 s=9 7r-54=2 7r=56 r=8 So (8,9) is the solution

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