Question

The cost of a pen and a note book is 110.The cost of the book is 100 more than the cost of the pen. What is cost if the book and pen​

Answer 1

Step-by-step explanation:

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Answer 2

Cost of Book = x

Cost of pen = y

Given, x = 100 + y ----(1)

Given, x + y = 110 ----(2)

Substitute value of x in (2)

100 + y + y = 110

100 + 2y = 110

2y = 10

Therefore, Cost of pen, y = 5

Substitute value of y in (1)

x = 100 + 5

Therefore, Cost of book, x = 105