   SEARCH HOME Math Central Quandaries & Queries  Subject: BEDMAS solving for X Name: damian Who are you: Student Hi, I am having a problem understanding why when using BEDMAS the text book example of the following question has used bedmas and reduced the calculation to 4/3. Text book formula: X/200,000 = (X - 90,000) / 150,000 X = 4/3 * (X - 90,000) X = 360,000 My solution: I always thought that when you do something to one side you do the same to the other. Why would the equation bring the 200,000 / 150,000 down to 4 / 3 I would think it would look something like this. X/200,000 = (X - 90,000) / 150,000 X = 200,000*((X - 90,000) / 150,000) Hi Damien. You are right, but so is the text book. 200 000/150 000 equals 4/3.

X = 200,000*((X - 90,000) / 150,000)
X = 200,000 / 150,000 * (X - 90,000) (because of the commutative property)
X = 4/3 * (X - 90,000) (reducing the fraction)

Stephen La Rocque.>     Math Central is supported by the University of Regina and The Pacific Institute for the Mathematical Sciences.