Question

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

Answer 1

Hi !!!

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

Cost of one pencil = y-3
Cost of 3 pencils = 3*(y-3) = 3y-9

∴ Total cost of 5 pens and 3 pencils = 10x+15 + 3y-9
                                                         = 10x + 3y + 15 -9
                                                         = 10x + 3y + 6

Hope you got the answer.
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