# How do you solve 2x + y = 6 and y = 3x + 4 using substitution?

Mar 11, 2016

$x = \frac{2}{5}$
$2 x + y = 6 \text{ } \textcolor{g r e e n}{y = 3 x + 4}$
$2 x + \textcolor{g r e e n}{3 x + 4} = 6$
$5 x = 6 - 4 \text{ } 5 x = 2$
$x = \frac{2}{5}$