SOLUTION: What is the solution to y=x+15 y=2x please add shortcut steps. 8th grade student. Thanks! God bless! Need solution for x and y.

Algebra ->  Linear-equations -> SOLUTION: What is the solution to y=x+15 y=2x please add shortcut steps. 8th grade student. Thanks! God bless! Need solution for x and y.       Log On


   

Question 1004345: What is the solution to y=x+15 y=2x please add shortcut steps. 8th grade student. Thanks! God bless! Need solution for x and y.
Answer by fractalier(6550) About Me  (Show Source):
You can put this solution on YOUR website!
Okay, if two quantities are both equal to y, as in
y=x+15 and
y=2x
then you can set them equal to each other...we can write
x + 15 = 2x
Now subtract x from both sides and get
x = 15
Then since y = 2x,
y = 30