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Question

solve by the substitution method

5x+7y=6

-6x+y=21
14 years ago

Answers

Reiny
from the 2nd ---> y = 21 + 6x
plug that into the 1st

5x + 7(21+6x) = 6 solve for x, then sub back into
y = 21+6x
14 years ago

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