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ABCD is an isosceles trapezoid with legs Modifying above upper A upper B with brand modifying above upper C upper D with brand base modifying above B C with bar. If the length of Modifying above upper A upper B with baris 7y – 4, the length of modifying above B C with bar is 4y – 6 and the length of modifying above upper C upper D with baris 8y – 18, find the value of y.
Since ABCD is an isosceles trapezoid, the lengths of the non-parallel sides are equal. Therefore, we have:
AB = CD
7y - 4 = 8y - 18
Now, let's solve for y:
7y - 8y = -18 + 4
-y = -14
y = 14
Therefore, the value of y is 14.