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02-02-2018
Mathematics

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The two triangles are similar. What is the value of x?

The two triangles are similar What is the value of x class=

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02-02-2018

If they are similar, their sides are proportional. The scale factor would be 20/28, which is 5/7.

5/7 = 3x/4x+2
Cross multiply
20x+10 = 21x
subtract 20x on both sides
10 = x

x = 10

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