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Tuesday, May 23 2017 @ 12:05 AM CDT
 Forum Index >  Test Paper Related >  Primary 4 Matters
 p6 maths
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By: hafiz24 (offline)  Wednesday, July 07 2010 @ 04:40 AM CDT (Read 1246 times)  
hafiz24



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.

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By: pklua (offline)  Thursday, July 08 2010 @ 03:58 AM CDT  
pklua

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.

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