book Maths Puzzle Numerical Ability

How do you find the answer to this word problem:

The perimeter of a rectangular garden is 40ft. The width is 2ft. more than one-half the length. Find the length and width.

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hue put 450.00 in an account that pays intrest at an annual rate of 3% how much will she have in 2 years? The nurse has 0.56 liters of a solution that is 89.9% alcohol. How much pure alcohol must she addd to bring the solution up to a 95.8% concenration? I cannot translate these proble