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How do you solve $x= y + 3$ and $3x - 2y = 4$ using substitution?

1 Answer

Apr 21, 2016

$y=-5$

$x=-2$

Explanation:

$x=y+3$ ----1
$3x-2y=4$ ----2

subtitute 1 into equation 2

$3(y+3)-2y=4$
$3y+9-2y=4$
$y+9=4$
$y=-5$

subtitute $y=-5$ into equation 1

$x=(-5)+3$
$x=-2$

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