Question

Solve the system of equations.

3x + 3y = –6
–x + y = 0

A.
x = 10; y = –3

B.
x = 22; y = 7

C.
x = –1; y = –1

D.
x = 14; y = 5

Answer 1

Simplifying
3x + -3y = -6

Solving
3x + -3y = -6

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '3y' to each side of the equation.
3x + -3y + 3y = -6 + 3y

Combine like terms: -3y + 3y = 0
3x + 0 = -6 + 3y
3x = -6 + 3y

Divide each side by '3'.
x = -2 + y

Simplifying
x = -2 + y

Answer 2

@chiefarnav i don't understand....how did you get that? thats not an option..

Answer 3

No its not

Answer 4

I think he's led you up the garden path

Answer 5

Just multiply the 2nd equation by 3

To get -3x+3y=0

Answer 6

If you then add the two equations you get
6y=-6 or y=-1
If you subtract the equations you get x=-1

Answer 7

From the 2nd equation, you know that x = y!
Now it becomes pretty simple to solve by substitution.