Solve by elimination: x - y = 3, x + 3y = 3

[Guest]

x - y = 3
x + 3y = 3

x - y = 3
-(x + 3y) = 3

x - y = 3
-x - 3y = -3

-4y = 0
y = 0

x - 0 = 3
x = 3

Is this correct if doing by elimination?
Thanks!!
Andrea

 

[minestrone]

Once again, you solved it correctly!!