SOLUTION: Please? I need help? Thank you. solve by graphing: x - 2y = 8 x + y = - 1 solve by substitution: 5x -3y = 13 4x - 3y = 11

Algebra ->  Coordinate Systems and Linear Equations -> SOLUTION: Please? I need help? Thank you. solve by graphing: x - 2y = 8 x + y = - 1 solve by substitution: 5x -3y = 13 4x - 3y = 11      Log On


   

Question 122734: Please? I need help? Thank you.
solve by graphing: x - 2y = 8
x + y = - 1

solve by substitution: 5x -3y = 13
4x - 3y = 11
Answer by checkley71(8403) About Me  (Show Source):
You can put this solution on YOUR website!
X-2Y=8
X+Y=-1 NOW SUBTRACT
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-3Y=9
Y=9/-3
Y=-3 ANSWER.
X+(-3)=-1
X-3=-1
X=-1+3
X=2 ANSWER.
PROOF
2-2*-3=8
2+6=8
8=8