SOLUTION: solve by substitution. x=2y y=2x+3 here's what i came up with. y=2(2y)+3 y=4y+3 3y=-3 y=-1 x=-2 now my problem is, how do i check my answer?

Algebra ->  Expressions-with-variables -> SOLUTION: solve by substitution. x=2y y=2x+3 here's what i came up with. y=2(2y)+3 y=4y+3 3y=-3 y=-1 x=-2 now my problem is, how do i check my answer?       Log On


   

Question 878840: solve by substitution. x=2y
y=2x+3
here's what i came up with.
y=2(2y)+3
y=4y+3
3y=-3
y=-1
x=-2
now my problem is, how do i check my answer?
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
Your steps are good and your answer is correct. YOU check this yourself if you want to know on your own. Just use x=-2 and y=-1 in the original equations are compute to see if both equations work with these solutions!