x = the age of his son now, then the age of the father is 4x.
In 20 years,
son's age = x + 20
father's age = 4x + 20
solve the equation for x:
4x + 20 = 2(x + 20)
4x + 20 = 2x + 40
2x = 20
x = 10
So the age of his son now is 10, and the age of the the father now is 40.
What you have there is:
10,000,000,000 + 9,000,000,000
Now, 1,000,000,000 is 1 billion.
This means that the 9 represents 9 billions.
Answer:
You have to right them like how they look on top.
49 85 63 51 60 94 47 35 78 54 92 87
<u>- 8 </u> <u> - 47</u> <u>-23</u> <u> -23</u> <u> -15</u> <u>-58</u> <u>-20</u> <u>- 9</u> <u> -10</u> <u> -38</u> <u>-39</u> <u>-28</u>
41 38 40 28 45 36 37 26 68 16 53 59
Hope this helps!! :D
Do oz so oz. Top oz so off.
