Question

3 pens and 2 erasers cost 5 USD, 3 pens and 3 erasers cost 5.7 USD, find the cost of 2 erasers

Answer 1

Step-by-step explanation:

answer....

3 pen + 2eraser = 5$. -----------(1)

and

3 pen + 3 eraser = 5.7$ ---------(2)

subtract equation (1) from (2)

3pen + 3eraser = 5.7

-- 3pen + 2 eraser = 5

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0pens + 1 eraser = 0.7$

so 1 eraser cost is equal to 0.7 dollar so cost of two eraser is equal to 1.4 dollar.

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