f(3)=3-5ln(3(3)-9)

Solution for f(3)=3-5ln(3(3)-9) equation:

Simplifying
f(3) = 3 + -5ln(3(3) + -9)

Reorder the terms for easier multiplication:
3f = 3 + -5ln(3(3) + -9)

Multiply 3 * 3
3f = 3 + -5ln(9 + -9)

Combine like terms: 9 + -9 = 0
3f = 3 + -5ln(0)

Reorder the terms for easier multiplication:
3f = 3 + -5 * 0ln

Multiply -5 * 0
3f = 3 + 0ln

Anything times zero is zero.
3f = 3 + 0ln

Combine like terms: 3 + 0 = 3
3f = 3

Solving
3f = 3

Solving for variable 'f'.

Move all terms containing f to the left, all other terms to the right.

Divide each side by '3'.
f = 1

Simplifying
f = 1