f(-a)=3(-a)+5

Solution for f(-a)=3(-a)+5 equation:

Simplifying
f(-1a) = 3(-1a) + 5

Remove parenthesis around (-1a)
f * -1a = 3(-1a) + 5

Reorder the terms for easier multiplication:
-1f * a = 3(-1a) + 5

Multiply f * a
-1af = 3(-1a) + 5

Remove parenthesis around (-1a)
-1af = 3 * -1a + 5

Multiply 3 * -1
-1af = -3a + 5

Reorder the terms:
-1af = 5 + -3a

Solving
-1af = 5 + -3a

Solving for variable 'a'.

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

Add '3a' to each side of the equation.
3a + -1af = 5 + -3a + 3a

Combine like terms: -3a + 3a = 0
3a + -1af = 5 + 0
3a + -1af = 5

Reorder the terms:
-5 + 3a + -1af = 5 + -5

Combine like terms: 5 + -5 = 0
-5 + 3a + -1af = 0

The solution to this equation could not be determined.