Since those lines are parallel, those two angles are equal. Therefore:
3x+15=105
3x=90
x=30
Let the amount that the man placed in the first investment be
. Then, the amount that he placed in the second investment has to be
. Using those as the investment amounts, the total profit is given by adding the two separate profits as shown:
We can now solve for x:
Thus,
First investment:
Second investment:
Answer:
only 1 is the factor as 11 is a prime number