SOLUTION: 7x + 9y = -27 -2x - 7y = 21 Solve using either elim. or sub.

Algebra ->  Coordinate Systems and Linear Equations -> SOLUTION: 7x + 9y = -27 -2x - 7y = 21 Solve using either elim. or sub.      Log On


   

Question 296499: 7x + 9y = -27
-2x - 7y = 21
Solve using either elim. or sub.
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
7x + 9y = -27
-2x - 7y = 21

2(7x+9y)+7(-2x-7y)= 2*-27 + 7*21
14x+18y-14x-49y=-54+147
-31y=93
y=-3
-2x-7*(-3)=21
x=0