3a+6=9-4

Solution for 3a+6=9-4 equation:

Simplifying
3a + 6 = 9 + -4

Reorder the terms:
6 + 3a = 9 + -4

Combine like terms: 9 + -4 = 5
6 + 3a = 5

Solving
6 + 3a = 5

Solving for variable 'a'.

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

Add '-6' to each side of the equation.
6 + -6 + 3a = 5 + -6

Combine like terms: 6 + -6 = 0
0 + 3a = 5 + -6
3a = 5 + -6

Combine like terms: 5 + -6 = -1
3a = -1

Divide each side by '3'.
a = -0.3333333333

Simplifying
a = -0.3333333333