SOLUTION: Y=5x-1 2x-y=7

Algebra ->  Coordinate Systems and Linear Equations -> SOLUTION: Y=5x-1 2x-y=7      Log On


   

Question 987050: Y=5x-1 2x-y=7
Answer by macston(5194) About Me  (Show Source):
You can put this solution on YOUR website!
.
y=5x-1
.
2x-y=7 Use above equation to substitute for y.
2x-(5x-1)=7
2x-5x+1=7
-3x=6
x=-2
.
y=5x-1
y=5(-2)-1
y=-10-1
y=-11
.
ANSWER: (-2,-11)
.
CHECK:
2x-y=7
2(-2)-(-11)=7
-4+11=7
7=7