SOLUTION: I have to do this with the substitution method: Help me please 3x = 4y x = (2y+1)/3 I know the answer is x=2/3 and y = 1/2 but I don't know the method Thank you

Algebra ->  Coordinate Systems and Linear Equations -> SOLUTION: I have to do this with the substitution method: Help me please 3x = 4y x = (2y+1)/3 I know the answer is x=2/3 and y = 1/2 but I don't know the method Thank you      Log On


   

Question 543980: I have to do this with the substitution method: Help me please
3x = 4y
x = (2y+1)/3

I know the answer is x=2/3 and y = 1/2 but I don't know the method
Thank you
Answer by umnikmo(75) About Me  (Show Source):
You can put this solution on YOUR website!
from the first we can find x in terms of y: x=4y/3, now we substitute this into second equation, we get:
4y/3=(2y+1)/3
we can multiply both sides by 3:
4y=2y+1
2y=1
y=1/2.
now, as x=4y/3=4*(1/2)/3=2/3
same as your answers.