SOLUTION: solve system using substution method x+2y=20 5x-2y=16 solution (?,?)

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Question 207973: solve system using substution method
x+2y=20
5x-2y=16
solution
(?,?)
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
x+2y=20 or x=20-2y
5x-2y=16
5(20-2y)-2y=16
100-10y-2y=16
-12y=-100+16
-12y=84
y=-84/-12
y=7 ans.
x=2*7=20
x+14=20
x=20-14
x=6 ans.
Proof:
5*6-2*7=16
30-14=16
16=16