HELP!

Two Chords AB and CD, are equidistant from the center of a circle. AB=3x+7 and CD=27-x. Solve for x and find the lengths of AB and CD

If they are equidistant, the clearly they must be equal

so solve
3x + 7 = 27-x
4x = 20
x = 5
AB = 3(5)+7 = 22
CD = 22