Find solution r+9-6r=28

Find the value of the variable and the length of each secant segment.

Four individuals pool money together to start a new business and agree to split the profits equally. n invests $6,000, x invests $2,000, y invests $8,000 and z invests $4,000. if the profits for the first month were $100,000, y receives than if the profits were divided in proportion to how much they invested.

Asap! i'm not good math and i'm lost.