Substitution+1Y

1. you have y = 2x and you dont have a number for (x) or (y). 2. if you have another equation like x - y = 14 you can solve what equals (y) 3. take x (from the initial problem y=2x) and substitute it for y ( in the problem x - y = 14) so you get x - 2x = 14 4. so then you get -x = 14 5. then simplify to x=14 6. pug it back in to y = 2x 7. so you get y = 2 (14) 8. and simplify to y = 28