SOLUTION: SOLVE BY ELIMINATION -2x+5y=20 3x-7y=-26

Algebra ->  Systems-of-equations -> SOLUTION: SOLVE BY ELIMINATION -2x+5y=20 3x-7y=-26      Log On


   

Question 267296: SOLVE BY ELIMINATION
-2x+5y=20
3x-7y=-26
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
-2x+5y=20 multiply by 3
3x-7y=-26 multiply by 2 & add.
-6x+15y=60
6x-14y=-52
-------------
y=8 ans.
-2x+5*8=20
-2x+40=20
-2x=20-40
-2x=-20
x=-20/-2
x=10 ans.
Proof:
3*10-7*8=-26
30-56=-26
-26=-26