20% of John's savings is $120 more than 30% of Bryan's savings. After John spent 5/6 of his savings, John has $20 more than Bryan. Find John's savings at first.

John's savings=J
Bryan Savings=B

1st scenario: 20% of John's savings is $120 more than 30% of Bryan's savings

1/5J = 3/10B+$120
J = 3/2B+$600
B = 2/3J-$$400 ....(1)

2nd Scenario: 1/6 of John's saving is $20 more than Bryan's savings

1/6J = B+$20...(2)

substitute (1) in (2)

1/6J = 2/3J-$400+$20
1/2J=$380
J=$380 x 2 = $760

John's saving was $760 at first.