Question 863483
<span style='font-family:arial;'>Because y=-4, you can substitute -4 for y in the second equation:
{{{-3x-6(-4)=15 =-3x-6y}}}
Multiply
{{{-3x+24=15}}}
Subtract 24 from both sides
{{{-3x=-9}}}
Divide both sides by -3
{{{x=3}}}
<h3>x=3</h3></span>