A neighbor pays you and two friends $90 to paint her garage. You divide the money three ways in the ratio 2:3:5.

3x + 5x +7x = 90
15x = 90
x=6

Now, substitute that back into the original equation I showed you to find the three parts.

3(6) + 5(6) + 7(6) = 90
18 + 30 + 42 = 90
Your 3 parts are 18, 30, and 42. Hope this helped! :D