four people invested in a restaurant. one person invested $1000,000. two others invested in the ratio x:2x, and the fourth person invested an amount equal to the other three investors combined. the total investment was $1,100,000. A. write an expression for the amount invested by the fourth person. B. write an equation that allows you to find the amount invested by each person. C. How much did each person invest?

Answer 1

If the 4th person invested y, then
1,000,000 + x + 2x + y = 1,100,000
But y is as much as the other three together, so

y+y = 1,100,000
y = 550,000

I'm sure you can now find the other answers.

Answer 2

B. 100,000+x+2x+550,000=1,100,000
3x=1,100,000-650,000
3x=450,000
x=450,000/3
x=150,000

c. 1. 100,000
2. 150,000
3. 300,000
4. 550,000