<h2>
<u>Answer:</u></h2>
Susan = x
Gina = 3x
Sum of their ages = 12
Susan's age = ?
We can see that,

Susan is <u>3</u><u> </u><u>years </u>old.
5.3, 5.3000? I'm not entirely sure, however.
Answer:
A
Step-by-step explanation:
EDGE
If you want to multiply 3 * 2/3, then just multiply the numerators and divide it by the denominator.
3 * 2/3
6/3 = 2
If the original investment doubled in 10 years, then double the investment
will double again in the next 10 years. Thus, in <u>20 years</u>, the original sum
would have increased fourfold.