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Faizal had a sum of money. he spent 1/4 of money on wallet and 2/5 of remainder on A book. After that, his parents gave him $120. Finally, the ratio of amount of monet in the end to the amount at furst was 5:4. What was the su. If mi ey he had at first
Money*

Jawapan

2016-03-24T17:09:45+08:00

Ini Jawapan Diperakui

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Jawapan diperakui mengandungi maklumat yang boleh dipercayai dan diharapkan yang dijamin dipilih dengan teliti oleh sepasukan pakar. Brainly mempunyai berjuta-juta jawapan berkualiti tinggi, semuanya disederhanakan dengan teliti oleh ahli komuniti kami yang paling dipercayai, tetapi jawapan diperakui adalah terbaik di kalangan terbaik.
1/4 = wallet

2/5 of remainder = book

2/5 x 3/4
= 6/20
= 3/10

$120 = parent give

ratio of end to first = 5:4


the amount he spend
= 1/4 + 3/10
= 10/40 + 12/40
= 22/40

the remainder after spent
= 1 - 22/40
= 18/40

let say the first = T

18T/40 + 120 : T = 5:4
4(18T/40 + 120) = 5T
18T/10 + 480 = 5T
18T/10 + 4800/10 = 5T
18T + 4800 = 50T
50T - 18T = 4800
32T = 4800
T = 4800/32
T = 150


so, the sum of money that Faizal had at first is $150
2 5 2
oh, tiada pula. kerana method ini yang paling mudah dan senang faham
Tidak apa lah
maaf ya, kerna tidak dapat membantu. macam soalan KBAT saja.
Tidak apa, saya akan cuba
good luck! ^_^