book Maths Puzzle Numerical Ability

perimeter of a rectangle is 22 inches and its length is 4 inches less than twice its width. Set up a system of linear equations and solve to find the dimensions of the rectangle.

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Hi! i'm stuck on this problem. Radical and fractional exponents
(3{{{SQRT}}2- 2{{{sqrt}}}3) ^3.

thanks The length of a rectangle is three inches more than the width. The area of the rectangle is 270 inches. Find the width of the rectangle.