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Primary 6
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Number and Algebra
Another question need help. Thanks
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7
Kim Soon Chin
Sarah : 22U=18P -> P=11U/9
Johari : 12U+21=10P+15
-> 108U+189=110U+135
-> 2U=54
-> U=27
Sarah : 22x27=594
Johari: 12x27+21=345
5 years ago
Chua Choon Hock
Kim Soon, what is P= ?
5 years ago
Kim Soon Chin
You just need to calculate either P or U. Any way, P = 11x27/9=33
When substitute back, you will get the same answer.
Sarah : 18x33=594
Johari: 10x33+15=345
5 years ago
Chua Choon Hock
ok pls advise why 22U=18P?
5 years ago
Kim Soon Chin
Sarah spent $22 each day for U days to finish her money. If she spent $18 each day, she needs P days to finish her money. 22xU=18xP=total money Sarah has.
5 years ago
Chua Choon Hock
Thanks Kim Soon
5 years ago
Kim Soon Chin
U r welcome
5 years ago
Adrian Ng
Asked 8 years ago
SG
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Primary 4
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Number and Algebra