A garden is measuring 12m by 16m is to have a path around it, increasing the total area to 285 square metre. what is the width of the path?

I went like that
(16+2x).(12+2x)= 285

I am stuck now

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  1. You're right.

    By the way, the solutions of your your quadratic equations are:

    x = - 31 / 2 and x = 3 / 2

    Length can not be negative so x = 3 / 2 = 1.5 m

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