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How do you solve the system $y=2x$ and $x+3y=-14$ using substitution?

1 Answer

Apr 21, 2018

$(-2, -4)$

Explanation:

Substitute the $2x$ in for $y$ in the second equation:

$x+3(2x)=-14$

$x+6x=-14$

$7x=-14$

$x=-2$

We know that $x$ is $-2$ and that $y$ is $2*x$ .

$y=2*-2$

$y=-4$

$(-2, -4)$

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