Question

Solve the system of equations.
y = 2x
x + y = -6

Answer 1

If y = 2x then you will just plug that into the next equation
x+2x = -6
3x = -6
x = -2

y = 2(-2)
y = -4

Answer 2

y=-4

x=-2

Explanation:

Given:

x+y=-6

y=2x

So, you can then substitute y for 2x

x+(2x)=-6

Then, solve for x

3x=-6

x=-2

Then solve for y

y=2x=2(-2)=-4