SOLUTION: i need help on solving this problem 4x+7y=28, y=2x-14

Algebra ->  College  -> Linear Algebra -> SOLUTION: i need help on solving this problem 4x+7y=28, y=2x-14      Log On


   

Question 222909: i need help on solving this problem 4x+7y=28, y=2x-14
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
4x+7y=28, y=2x-14
-----------------------
Substitute for y and solve for "x":
4x + 7(2x-14) = 28
4x + 14x - 98 = 28
18x = 126
x = 7
============
Cheers,
Stan H.