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23-12-2016
Biology

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Jaoquin buys 3 dozen lightbulbs. After changing the lightbulbs in his house, he has 15 lightbulbs left. How many lightbulbs did he use? Explain your work. I need the help like right now!!

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Аноним Аноним

23-12-2016

1 dozen = 12
3 dozens = 3×12=36
Bulbs left=36-15
=21
The answer is 21 bulbs.
Hope it helps!

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