Question

If 5x+y=19 and x-3y=7, then x+y=?

Answer 1

5x+y=19, set x equal to zero. then solve.
x-3y=7, set y equal to zero. then solve.
then plug into x+y=?

Answer 2

Do you know how to do as a system of equations problem

Answer 3

yea

Answer 4

Could you show me how to do it that way

Answer 5

okay so your equation will look like this:
5x+y=19
x-3y=7
then you will multiply -5 to the bottom equation. so that the x's will cancel out and all you have to solve is for y. once you solve for y plug that answer to either problem and you will get your answer

Answer 6

Okay thank you i get it now

Answer 7

your welcome