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Can you guys help me with #3? I have no idea how to solve for X. The answer I keep getting isn't one of the options.

Can you guys help me with #3? I have no idea how to solve for X. The answer I keep-example-1
User Rby
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I started out with a proportion like you had, 24/16=20/x and I got 13.333. So I found the area of the big rhombus and set it equal to the smaller one. 24*20=16*x -->  480=16x and then x=30
User Harry Ninh
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