book Maths Puzzle Numerical Ability

Find two consecutive odd integers, such that when the smaller is added to twice the larger, the result is 24 more than twice the larger integer.

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book Other Question

The length and width of a rectangle are consecutive even intergers, and the length is lcm. Find (a) area and (b) perimeter of the rectangle. I need to simplify, can you help?

(3x+9)/(x^2-x-12 * (x^2+5x+6)/(24x+48)