Question

of the cost of 1 book is twice of 1 pen then find the cost of three book and 1 pen

Answer 1

if the cost of. pen is x
then cost of book is 2x

then cost of three bbok and one pen
= 3(2x) + x
= 7x

Answer 2

Heya dear user !!!

Here is your answer,

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Given :-
The cost of 1 book is twice of 1 pen

Let the cost of pen = Rs. x
So,
the cost of book = Rs. 2x

Now,
cost of three book = 3*2x = Rs. 6x

Hence,
cost of 3 book and 1 pen,
= 6x + x = 7x

Cost of cost of 3 book and 1 pen = Rs. 7x

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Hope it helps.