Solve for x and y using Substitution method

x+2y==-1
y=-3x-8

Question

Solve for x and y using Substitution method

x+2y==-1
y=-3x-8

xXAikoXx · Answer

First of all, we need to substitute the second equation into the first one.

$x+2y=-1$ 
$x+2(-3x-8)=-1$

Then, we need to simplify the equation.

$x+2(-3x-8)=-1$
$x-6x-16=-1$
$-5x-16=-1$
$-5x=15$
$x=-3$

The last thing to do is... substitute x=-3 into the 2nd equation to solve for $$y$$.
$y=-3x-8$
$y=-3(-3)-8$
$y=9-8$
$y=1$

Your final answers will be:
$x=-3$
$y=1$

🫶

xXAikoXx · Answer

@makala2fine

Makala2fine · Answer

Thank you for explaining it to me!

xXAikoXx · Answer

@makala2fine wrote:

Thank you for explaining it to me!

You're welcome, ping me anytime you need help!