Is this an expression or an equation? 4a + 3b-6cx9

If f(x) =3x-2 and g(x) =2x+1 fins (f+ g) (x)

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.

How do i put 3(x+7) in distributive property