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If seven bags of aluminum cans weight 21 pounds how many pounds do 15 bags of aluminum weight show all work?
Wiki User
∙ 7y ago
7/21 = 15/X
cross multiply
7X = 15x21
X= 15.21/7
x= 315/7
x = 45
Or you can do this by reasoning if 7 bags = 21 pounds then 1 bag = 3lbs (21 divided by 7)
If 1 bag = 3lbs then 15 bags = 15x3 lbs = 45
Wiki User
∙ 7y ago
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