9a+3(a+3)-a=

Solution for 9a+3(a+3)-a= equation:

Simplifying
9a + 3(a + 3) + -1a = 0

Reorder the terms:
9a + 3(3 + a) + -1a = 0
9a + (3 * 3 + a * 3) + -1a = 0
9a + (9 + 3a) + -1a = 0

Reorder the terms:
9 + 9a + 3a + -1a = 0

Combine like terms: 9a + 3a = 12a
9 + 12a + -1a = 0

Combine like terms: 12a + -1a = 11a
9 + 11a = 0

Solving
9 + 11a = 0

Solving for variable 'a'.

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

Add '-9' to each side of the equation.
9 + -9 + 11a = 0 + -9

Combine like terms: 9 + -9 = 0
0 + 11a = 0 + -9
11a = 0 + -9

Combine like terms: 0 + -9 = -9
11a = -9

Divide each side by '11'.
a = -0.8181818182

Simplifying
a = -0.8181818182