Question

george has 9 more dollars than Frank, who has 3 more than Richard. What is the least amount of money that must be exchanged so that they each have the same amount of money?
A) 4
B) 5
C) 6
D) 7
E) 8

Answer 1

R = R
F = R + 3
G = R +3 + 9

Take 5 from George and give to Richard. Take 2 from George and give to Frank. Now it's:
R = R + 5
F = R + 3 + 2
G = R + 3 +9 -7

Which is
R = R+5
F = R+5
G = R+5

Answer 2

Assuming George gives away x dollars, Richard has to receive (12-x) dollars to be even with him, and Frank has to receive 9-x dollars to be even with him.

So what is the x for which x=12-x +(9-x)?
x= 21 - 2x
Solve for x.

Answer 3

x=7

Answer 4

Yes.

Answer 5

thank you lol