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If the circumference of a rectangle is 12cm, if the length is reduced by 1cm and the width is increased by 2cm, it is a square, then the area of the rectangle is CM & sup2; It's better to be an equation, but the formula is OK. If there is a fine process
2x + 2y = 12
x-1 = y + 2
==> x = 4.5 y = 1.5
x * y = 4.5 * 1.5 = 6.75
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