Determine the value of x. Write your answer as a numerical value only.
12/ 27 = 20 / ( 20 + 3x + 1) cross-multiply
12 ( 20 + 3x + 1) = 20 * 27
12 ( 21 + 3x) = 540
21 + 3x = 540 / 12
21 + 3x = 45
3x = 45 - 21
3x = 24
x = 24 / 3 = 8
