Lengths of two opposite sides of a parallelogram are (2x + 5) and (5x - 7) cm. Find the length of this side.
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opposite sides of a parallelogram are equal.
so,
2x + 5 = 5x - 7
5x - 2x = 5 + 7
3x = 12
x = 4.
2x + 5 = 2(4) + 5 = 8 + 5 = 13 cm.
5x - 7 = 5(4) - 7 = 20 - 7 = 13 cm.
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