



 
Hi Tracy, You are instructed to show your work not mine so I am not going to do these problems for you but I will help her you started on the first problem. If the profit is $\$4,800$ and they split it 3 ways then each of them will get $\$4,800/3 = \$1,600.$ Together they invested $\$9,000 + \$7,000 + \$4,000 = \$20.000.$ The fraction of the investment that came from X is $\large \frac{\$9,000}{\$20,000} = \frac{9}{20}.$ Thus if they divide the profit in proportion to the amount invested than the fraction of the profit coming to X will be $\large \frac{9}{20}.$ I hope this helps,  


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