The cost of 1note book is 15more than a pen cost. If he bought 5notebooks and 3pens then what is total amount
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let 1 pens cost be=x
therefore notebooks cost=x+15
5(x+15)=3x
5x+75=3x
5x-3x=-75
2x=-75
x=-37.5 rupees
as money cannot be expressed in negative we can put it as 37.5 rupees therefore the total amount is 37.5 rupees hope it helps!!
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