Picture Perfect

Author:wotton.dorothea.18

The Problem:

A 9-by-12 rectangular picture is framed by a border of uniform width. Given that the combined area of picture plus frame is 180 square units, find the width of the border.

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apec
အခြေခံ data အခေါ်အဝေါ်များ
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التمرين الثاني صــ140 : المدرّس شادي سمعان
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