Question 1194873
Three friends, alex,Brenda and charles decided to buy a car.
 Alex pays 1/4 of the cost, Brenda pays 1/3 of the cost and charles pays the rest.
 What fraction of the cost does charles pay?
let c = cost of the car
c - {{{1/4}}}c - {{{1/3}}}c = Charles' share
common denominator is 12
{{{12/12}}} - {{{3/12}}} - {{{4/12}}} = {{{5/12}}} is the fraction Charles paid
:
Brenda pays 12000 more than alex. Calculate the cost of the car? 
{{{1/3}}}c - {{{1/4}}}c = 1200
get rid of the fractions, mult by 12, cancel the fractions
4c - 3c = 12(1200)
c = $14,400 is the cost of the car