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Mathematics 20 Online
OpenStudy (anonymous):

x+12y=68 x=8y-12

OpenStudy (anonymous):

This is simple substitution. Plug x=8y-12 into the first equation. 8y-12+12y=68 20y-12=68 20y=80 y=4 Then plug that value of y back into the original equation to get the value of x. x=8(4)-12 x=32-2 x=20

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