Explanation:
'n' cannot equal -14 because the denominator would be = 0 which is not allowed.
multiply both sides of the equation by n + 14 to get
n = 5/7 ( n+ 14 ) expand
n = 5/7 n + 10
2/7 n = 10
n = 7/2 * 10 = 70 / 2 or 35
( LCD would be 7 ( n+ 14) )