I really need help. Solving Systems with Substitution y=2x x+y=(-9) Question I really need help. Solving Systems with Substitution y=2x x+y=(-9) in progress 0 Math Sophia 1 week 2021-10-05T20:32:01+00:00 2021-10-05T20:32:01+00:00 1 Answer 0

## Answers ( )

Answer:Step-by-step explanation:If you let y=2x, you can plug it into the other equation.

x+2x=-9

Then solve that equation.

3x=-9

x=-3

Then use y=2x to find y.

y=2(-3)=-6

y=-6