Question

write a linear equation in two variable of the following a man bought 2
pens and 5 book for 100rupees

Answer 1

let the cost of a pen is x
then cost of 2 pen is 2x
let cost of a book be y
then cost of 5 book is 5y
a/q (2x + 5y = 100) is the equation

Answer 2

Hi mate....
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Here,
Let the cost of pen is =x
Then, cost of 2 pens is =2x

Let,
the cost of book Y
Then cost of 5 books
a/q = 100 is the equation