Question 757202
Fiona and Hoggy gain a kilo each every week. Fiona is currently 70kg, while Hoggy is 10kg. How many weeks does it take for Fiona to be TWICE as heavy as Hoggy?
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The difference remains 60 kg, so it's when Hoggy weighs 60 kg.
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w = # of weeks
F = 70 + w
H = 10 + w
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F = 2H
70 + w = 2(10+w)
70 + w = 20 + 2w
w = 50 weeks