Question

How To solve it with solution plz ​

Answer 1

let the total money be x .

money spent on purchasing a book be 3/7 of x .

left money be (x - 3/7x)=220

so, 4/7x =220

X=220*7/4

x =55*7

x=385

so, total money is 385

cost of maths book is 165