equation for finding cost of one pencil?

if, the cost of two pencils and one eraser is 19 rupees and the cost of two erasers and one pencil is 14 rupees, then what will be the cost of each pencil?
in order of operations by

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1 Answer

1...2p +e=19  or 4p +2e=38

2...p +2e=14

line 1 - line2...(4p-p) +(2e-2e)=38-14

3p=34

p=8

line 2...8+2e=14 or 2e=6, so e=3
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