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Mathematics, 21.05.2020 04:58 monkeyrose1999

Parallelogram F C D E is shown. Sides D C and F E are parallel, and sides F C and E D are parallel. The length of C D is 4 r + 19, the length of D E is 8 r + 3, and the length of F C is 9 r minus 6.
What is the value of r?

What is the length of segment EF?

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