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primary 5 | Maths
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Cindy
Cindy

primary 5 chevron_right Maths chevron_right Singapore

Please help. Thank you

Date Posted: 5 years ago
Views: 281

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Edwin David Goh
Edwin David Goh's answer
16 answers (Tutor Details)
1st
This is tough! LOL
Cindy
Cindy
5 years ago
Thank you. But I dont understand why 11 sets of ~20 = 7 sets of ~~~.
Edwin David Goh
Edwin David Goh
5 years ago
Common multiple.

11C = 3u .... x 7
7C = 1u + 20 x 11

77C = 21u
77C = 11u + 220

Hence we can say 21u = 11u + 220, 10U = 220, u = 22
Cindy
Cindy
5 years ago
Sorry, i still don't understanding, any other way to explain this question? Thank you.