SOLUTION: My question is: Use substitution to solve this- y=2x-5 & 3y-x=5 i tried adding them together then dividing it by 2, but it came out wrong.

Algebra ->  Expressions-with-variables -> SOLUTION: My question is: Use substitution to solve this- y=2x-5 & 3y-x=5 i tried adding them together then dividing it by 2, but it came out wrong.      Log On


   

Question 714344: My question is: Use substitution to solve this- y=2x-5 & 3y-x=5
i tried adding them together then dividing it by 2, but it came out wrong.
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
3y-x=5


3(2x-5)-x=5 ... plug in y = 2x-5 (ie replace y with 2x-5, we can do this because y and 2x-5 are the same)


6x - 15 - x = 5


5x - 15 = 5

I'll let you finish. You need to solve that equation for x. Once you have x, you can use that value of x, along with y = 2x - 5, to find y.