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23 August, 19:57

A rectangle has a perimeter of (12+8y). If one side of the rectangle is (4x-2y), write an expression of the other side.

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  1. 23 August, 20:05
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    P = 2 (l+w)

    substitute for P and l

    12+8y = 2 (4x-2y+w)

    distribute

    12+8y = 8x - 4y + 2w

    solve for w

    subtract 8x from each side

    12 + 8y - 8x = - 4y+2w

    add 4y to each side

    12 + 12 y - 8x = 2w

    divide by2

    6 + 6y-4x = w

    the other side is 6+6y-4x
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