Question

Renu spends 3/7 of her pocket money on purchasing a new math book and is left with Rs. 220. find the Cost of the math book?

pls answer with step by step

with the working its ok if you write on a notebook and send ​

Answer 1

Answer:Rs.165

Step-by-step explanation:

let x be the total amount

x=3/7x+220

x-3/7x=220

4/7x=220

x=385

the cost of maths book:

385-220=165

hence the ans is Rs.165