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Mathematics 20 Online
OpenStudy (anonymous):

I attached my question.

OpenStudy (anonymous):

OpenStudy (anonymous):

Both shapes are similar, so their corresponding parts are proportinal \[\frac{18}{14} = \frac{10x}{6x+20}\] http://www.wolframalpha.com/input/?i=solve+18%2F14+%3D+10x%2F%286x%2B20%29 It must be the third option.

OpenStudy (anonymous):

Thanks!

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