Answer:
x = 8
Step-by-step explanation:
Let's call the unknown number x
Then, four times a number can be written as 4x and two times that same number and 16 can be written as 2x+16
So, the expression that describes the complete sentence is:
4x = 2x + 16
Now, we can solve for x. So, subtracting 2x from both sides:
4x - 2x = 2x + 16 - 2x
2x = 16
Dividing by 2, we get:
2x/2 = 16/2
x = 8
Therefore, the unknown number is x = 8