Brian Was thinking of a number. Brian adds 8 to it, then doubles it and gets an answer of 16.4. What was the original number?

Help Me With This Question Please! I'm Having A Hard Time Answering With It. :(

The number is 0.2

Step-by-step explanation:

Write an equation for it:

Say that the number was called x

2(x +8) =16.4

Brain added 8 to the number (x) and then doubled it which is the 2

Times out the brackets 2x + 16 = 16.4

Take away 16 from both sides

2x = 0.4

0.4 / 2 = 0.2

0.2

Step-by-step explanation:

Let that number be n

Adds 8: n+8

Then doubles: 2(n+8)

2(n+8) = 16.4

n+8 = 8.2

n = 0.2 or ⅕

answer: the answer is one of

step-by-step explanation:   we are given to write a proper fraction where the whole is divided into an even number of equal parts less than ten, and an odd number of those parts exist.

an even number less than 10 may be one of 2, 4, 6 or 8. so, the whole may be one of these four evens.

now, an odd number of these parts must exist, so the numerator must be an odd number, one of 1, 3, 5 or 7. it cannot be 9 because then the fraction will become improper.

thus, our fraction may be one of the following