exam Maths Puzzle Numerical Ability

if the length of a side of a square is increased by 3 centimeters, the perimeter of the new square is 40 centimeters more than twice the length of a side of the original square. find the dimensions of the original square

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1/x-2 - 4/x^2-4 + 3/x+2 A long-distance phone call costs $1.28 for the first minute and $0.78 for each additional minute or portion thereof. Write an inequality representing the number of minutes a person could talk without exceeding $8.