exam Maths Puzzle Numerical Ability

In a right triangle, the hypotenuse is 1 foot more than twice the shortest side. The other side is 1 foot less than twice the shortest side. What is the length of the shortest side?

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ok here is my problem

6x+3=2x+11

now what do i do with it. ive tried everything and cant seem to get the right answer. Plz help Vicki is 1/3 as old as her cousin, chris, plus 5 years. Vicki is 14 years old. how old is chris?