SOLUTION: x + y = 20 28x + 16y = 416

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Question 169126: x + y = 20
28x + 16y = 416
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
x + y = 20 multiply by -16 & add.
28x + 16y = 416
-16x-16y=-320
----------------
12x=96
x=96/12
x=8 ans.
8+y=20
y=20-8
y=12 ans.
Proof:
28*8+16*12=416
224+192=416
416=416