If 9 - 4/X = 7 + 8/X, then X =	Choose the correct option:
A) 15	B) 6	C) 1	D) 5	E) 12
We're given the equation 9 - 4/X = 7 + 8/X. We're asked for the value of X.   The common-denominator of these 4 numbers is X, so we have to multiple 2 of the numbers to give them that denominator...   9X - 4X/X = 7X + 8X/X   We can then eliminate that denominator, which gives us....   9X - 4 = 7X + 8   12 = 2X   Both 2X and 12 have a common denominator of 2, so we divide both sides by 2 for our final answer...   6 = X   6
<result>B</result>
If 9 - 4/X = 7 + 8/X, then X =