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Trapezoid Area =

 100 u^2 7X +60 - [6(10 - X)]/2 = 

100 7X + 60 - (30 - 3X) = 

100 7X + 60 - 30 + 3X = 

100 10 X = 70

 ===> X = 7

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X/y=14/6=7/3

X=7m

y=3m

7m+3m=10

m=1

X=7

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134

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