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if 7 cost 1.40

then 7÷7 = 1 cost 1.40 ÷ 7

→ 1×9 = 9 cost (1.40÷7) × 9 = 1.80

9 will cost 1.80

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6y ago
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6y ago

(1.40 ÷ 7) × 9 = 1.80 for nine

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Q: If 7 cost 1.40 how much would 9 cost?
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