7. A pencil box contains 2 pens that cost ta, 2 pencils that cost band an eraser that costs & c. If the cost of the pencil box is d, find the total cost of 2a + b pencil boxes.
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7. A pencil box contains 2 pens that cost ta, 2 pencils that cost band an eraser that costs & c. If the cost of
Verified answer
Step-by-step explanation:
Cost of one pencil = Rs 2
Cost of one fountain pen = Rs 15
Cost of x pencils = 2x
Cost of y fountain pens = 15y
So the cost of x pencils and y fountain pens = Rs (2x + 15y)
Hence, the cost of x pencils and y fountain pens is Rs (12x + 15y).