Question 67

If the cost of 3 pencils and 1 sharpner is Rs. 25, the cost of 2 sharpners and 2 erasers is Rs. 14 and the cost of 3 erasers is Rs. 9, then the cost of 1 pencil is

Solution

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One eraser costs $$\frac{9}{3} = 3$$ rupees. Then $$2s + 6 = 14$$ gives a sharpener cost of 4 rupees. Finally $$3p + 4 = 25$$ gives $$p = 7$$ rupees.

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