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the length of a rectangle is 9 centimeters more than half the width . Find the length if the perimeter is 60cm.

I know the answer is 16 cm, but I got a different answer. please help

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1 answer
  1. width = w
    length = w/2 + 9
    30 = half perimeter = w + w/2 + 9
    21 = 3 w /2
    w = 42/3
    length = w/2 + 9 = 42/6 + 9
    =7+9 = 16 sure enough
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