Question

the cost of pen Rs.2x+3.the cost of pencil is y-3find the cost of 5 pens and 3pencils

Answer 1

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Cost of 1 pen = 2x + 3
Cost of 5 pens = 5(2x + 3) = 10x + 15

Cost of 1 pencil = y - 3
Cost of 3 pencils = 3(y - 3) = 3y - 9

Total cost = (10x + 15) + (3y - 9)
= 10x + 3y + 6

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