What is:

3/4n - 18 = 1/4n - 4?

Group the n's together:

3/4n -1/4n = 18-4

Subtract:
2/4n = 14

Divide both sides by (2/4) to get n alone:
(2/4n)/ (2/4) = 14/(2/4)

n = 28

To solve the equation 3/4n - 18 = 1/4n - 4, we need to isolate the variable n.

Step 1: Simplify both sides of the equation by first combining like terms.
- On the left side, we have the term 3/4n.
- On the right side, we have the term 1/4n.

Since both terms have the same variable n, we can subtract 1/4n from both sides to simplify the equation:

3/4n - 1/4n - 18 = -4

Now we have:
2/4n - 18 = -4

Step 2: Simplify further by converting the fractions into decimals:
Recall that 2/4 = 1/2, so we can rewrite the equation as:

1/2n - 18 = -4

Step 3: To isolate the variable n, we'll get rid of the constant term (-18) on the left side.
We can do this by adding 18 to both sides of the equation:

1/2n - 18 + 18 = -4 + 18

Simplifying further, we have:
1/2n = 14

Step 4: Finally, to solve for n, we'll multiply both sides of the equation by 2/1, which is the reciprocal of 1/2:

(1/2n) * (2/1) = 14 * (2/1)

This simplifies to:
n = 28

So, the solution to the equation 3/4n - 18 = 1/4n - 4 is n = 28.