Dhoni has x dollars more than Rahul has, and together they have a total of y dollars. Which of the following represents the number of dollars that Rahul has?  Choices:  A) (y – x)/3  B) (y – x)/2  C) (y – x)/4  D) (2y – x)/2  E) (y – x)/5
To solve, we will set up two equations. Let's start by defining two variables.   R = number of dollars Rahul has   D= number of dollars Dhoni has   We are given that Dhoni has x dollars more than Rahul. We set up an equation:   D= x + R   We are next given that together they have a total of y dollars. We can set up our second equation:   R + D = y   Since we know that D = x + R, we can substitute x + R for D into the second equation R+ D = y.   Notice that, after the substitution, we will only have variables of R, x, and y. Thus, we have:   R + x + R = y   2R + x = y   2R = y – x   R = (y – x)/2   Answer : (y – x)/2
<result>B</result>
Dhoni has x dollars more than Rahul has, and together they have a total of y dollars. Which of the following represents the number of dollars that Rahul has?