3a-6-7a+9a=

Solution for 3a-6-7a+9a= equation:

Simplifying
3a + -6 + -7a + 9a = 0

Reorder the terms:
-6 + 3a + -7a + 9a = 0

Combine like terms: 3a + -7a = -4a
-6 + -4a + 9a = 0

Combine like terms: -4a + 9a = 5a
-6 + 5a = 0

Solving
-6 + 5a = 0

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 + 5a = 0 + 6

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

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

Divide each side by '5'.
a = 1.2

Simplifying
a = 1.2