SOLUTION: can you please help me solve this: Solve the following system by substitution -2x=8y+18 -33=7y-4x

Algebra ->  Coordinate Systems and Linear Equations  -> Lessons -> SOLUTION: can you please help me solve this: Solve the following system by substitution -2x=8y+18 -33=7y-4x      Log On


   

Question 683910: can you please help me solve this:
Solve the following system by substitution
-2x=8y+18
-33=7y-4x
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
-2x = 8y+18

x = (8y+18)/(-2)

x = (8y)/(-2)+18/(-2)

x = -4y - 9


-------------------------------------------------------

-33 = 7y-4x

-33 = 7y-4(-4y-9)

-33 = 7y+16y+36

-33 = 23y+36

I'll let you finish. Once you have found the value of y, use it to find the value of x.