book Maths Puzzle Numerical Ability

3w/5 - 1 = w/2 + 1

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book Other Question

-3(-x-4)=2x+1 A rectangular garden is 15 by 12 meters, you need to have a rectangular area inside such that a uniform strip of side walk is made, the area inside has to be 108 square meters. Find the dimensions of the interior area.