Answer:
First, you want to know the profits of the three people involved. so...
4800/3=1600
Then, you would make an equation with the proportions: 9x+7y+4x=4800.
Add the invests: 9+7+4=20x and the 4800 would stay same.
Then divide 4800/20 to get 240
Now plug the investments to 240
(9)(240) is 2160
(7)(240) 1680
(4)(240) is 960
Lastly, you must subtract to find x as the investments
so you would do 2160-1600 and you get x=560
$560 is your final answer
Positive, exercise helps your respiratory and circulatory systems get stronger.
Non-infectious or non-communicable diseases are not able to be spread from one person to another.
