geometry
posted by Ryan .
Isosceles trapezoid ABCD has legs AB and CD and base BC If AB = 7y – 4, BC = 4y – 6, and CD = 8y – 18, find the value of y.

geometry 
Steve
The key here is "isosceles". That means the legs are equal.
7y4 = 8y18
y = 14
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