PLEASE help with question 1 and 2

What is 1/2 x (6 x 4)+3 + 2 show your work

Which shows the correct solution of the equation 1/2a+2/3b=50, when b=30?

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.