Answer:
9 boxes
Explanation:
1/2 = x/18
2x = 18
x = 9
9 boxes will be needed for 18 children.
To check:
18 * 12 = 216
9 * 24 = 216
24 crayons each box
each child needs 12 crayons
1 box per 2 children
need to be 18 children
1 box per 2 chlidren
x boxes per 18 children
2x=18
x=9
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