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Mathematics 12 Online
OpenStudy (anonymous):

7x+4y=13,x+y=1 substitution method

OpenStudy (nory):

Solve the second equation for one of the variables--let's use y. What equation do you get?

OpenStudy (nory):

y=1-x

OpenStudy (nory):

And then you substitute that into the first equation. You substitute 1-x in for y because 1-x=y.

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