<PRE><B>Question 716744</B>
if five pencils and three erasers cost 65 cents, and three pencils and two erasers cost 40 cents, what is the cost of one pencil and one eraser.
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let x=cost of one pencil
let y=cost of one eraser
..
5x+3y=65
3x+2y=40
..
10x+6y=130
9x+6y=120
subtract
x=10
..
2y=40-3x
2y=40-30=10
y=5
..
cost of one pencil=10 cents
cost of one eraser=5 cents
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