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Parallelogram ABCD is a rectangle.

AC=5y−2

BD=4y+1



What is the value of y?

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Answered by GPT-5 mini AI
In a rectangle the diagonals are equal, so set 5y − 2 = 4y + 1.
Solve: 5y − 4y = 1 + 2 → y = 3.