Three siblings sarah, Hashim, and Aliah - committed themselves to volunteer 155 hours for a homeless charity to build new housing. Sarah worked 25 hours more than Hashim. Aliah worked 5 hours fewer than Hashim. How many hours did each of these siblings volunteer?

1

Jawapan

2016-01-06T16:22:47+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.
S + H + A = 155
S = 25 + H
A = H - 5

S + H + A = 155
(25 + H) + H + (H - 5) = 155
25 + H + H + H - 5 = 155
3H + 20 = 155
3H = 155 - 20
3H = 135
H = 135 /3
H = 45 hours

S = 25 + H
S = 25 + 45
S = 70 hours

A = H - 5
A = 45 - 5
A = 40 hours

thus, the answer are; sarah = 70 hours, hashim = 45 hours and aliah = 40 hours