Answer:
18
Explanation:
Opposite sides of a rectangle are equal
Perimeter = 2(4y - 2) + 2(3y) = 66
8y - 4 + 6y = 66
Collect like terms
8y + 6y = 66 + 4
14y = 70
y = 70/14 = 5
Side XY = 4y - 2 = 4(5) - 2 = 20 - 2 = 18
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