Question

Solve the equation.

4n – 2n = 18


A.
3


B.
5


C.
9

Answer 1

The answer is C. 9

Explanation:

4n-2n = 18

4n - 2n is 2n

2n = 18

divide both sides by 2

you would get n=9

Answer 2

For this case we have the following equation:

`4n-2n = 18`

We add similar terms from the left side of the equation, taking into account that different signs are subtracted and the major sign is placed. So:

`2n = 18`

We divide between 2 on both sides of the equation:

`n = \frac {18} {2}\\n = 9`

Answer:

`n = 9`

Option C