\( \definecolor{colordef}{RGB}{249,49,84} \definecolor{colorprop}{RGB}{18,102,241} \)
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To build \(\textcolor{colordef}{1}\) bookshelf, \(\textcolor{colorprop}{10}\) wooden planks are needed. How many wooden planks are needed to build \(\textcolor{colordef}{3}\) bookshelves?
7
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9
4
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1
2
3
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0
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wooden planks
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