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primary 6 | Maths
| Data Analysis
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Date Posted: 5 years ago
Views: 291
$10-er: 12u
fiver: 12u+16
$2-er: 12u+16+20 = 12u + 36
after donated,
$10-er: 2u
fiver: (12u+16)/4 = 3u+4
$2-er: 2(12u + 36)/3 = 8u+24
2u + 3u + 4 + 8u + 24 = 106
u = 6
money donated
= 10x6 + 9x6+12 + 4x6 +12
= $162
fiver: 12u+16
$2-er: 12u+16+20 = 12u + 36
after donated,
$10-er: 2u
fiver: (12u+16)/4 = 3u+4
$2-er: 2(12u + 36)/3 = 8u+24
2u + 3u + 4 + 8u + 24 = 106
u = 6
money donated
= 10x6 + 9x6+12 + 4x6 +12
= $162
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