-4a+8+3a-9=a

Solution for -4a+8+3a-9=a equation:

Simplifying
-4a + 8 + 3a + -9 = a

Reorder the terms:
8 + -9 + -4a + 3a = a

Combine like terms: 8 + -9 = -1
-1 + -4a + 3a = a

Combine like terms: -4a + 3a = -1a
-1 + -1a = a

Solving
-1 + -1a = a

Solving for variable 'a'.

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

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

Combine like terms: -1a + -1a = -2a
-1 + -2a = a + -1a

Combine like terms: a + -1a = 0
-1 + -2a = 0

Add '1' to each side of the equation.
-1 + 1 + -2a = 0 + 1

Combine like terms: -1 + 1 = 0
0 + -2a = 0 + 1
-2a = 0 + 1

Combine like terms: 0 + 1 = 1
-2a = 1

Divide each side by '-2'.
a = -0.5

Simplifying
a = -0.5