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How do you solve the system $x+6y=-1, 5x+7y=-5$ using the substitution method?

1 Answer

Nov 21, 2016

$x=-1$
$y=0$

Explanation:

$x+6y=-1$
$x=-6y-1$

$5x+7y=-5$

$5(-6y-1)+7y=-5$
$-30y-5+7y=-5$
$-23y=0$
$y=0$

$x=-6y-1$
$x=-6(0)-1$
$x=-1$

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