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primary 6 | Maths | Fractions
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Date Posted: 1 year ago
Views: 261
sstrike
Sstrike
1 year ago
Ans: $4.45

(7) N → ($88.40-$18.40)÷2 = $35
(3) F → $35+$18.40 = $53.40

1 part N → $35÷7 = $5
1 part N → $53.40÷3 = $17.80

diff → $17.80-$5 = $12.80

$12.80÷$3.20 = 4

$17.80÷4 = $4.45 (Ans)

Check
$F + $N
= 3×4×$4.45
+ 7×4×($4.45-$3.20)
= $88.40 ✓

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sstrike
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