math
posted by carol on .
Web Results For:The ratio of john's money to Peter's money was 4:7 at first. After john spent 1/2 of his money and Peter spent $60. Peter had twice as much money as john. How much money did john have at first?

let amount of John's money be 4x
let amount of Peters money be 7x
after transaction, John has 2x
Peter has 7x60
7x60 = 2(2x)
3x = 60
x = 20
John at first had $80 and Peter had $140
check:
John spent half his money , so he has $40 left
Peter spent $60, so he has $80 left
Does Peter have twice as much as John? YES!