3(13-2a)=-3+9

Solution for 3(13-2a)=-3+9 equation:

Simplifying
3(13 + -2a) = -3 + 9
(13 * 3 + -2a * 3) = -3 + 9
(39 + -6a) = -3 + 9

Combine like terms: -3 + 9 = 6
39 + -6a = 6

Solving
39 + -6a = 6

Solving for variable 'a'.

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

Add '-39' to each side of the equation.
39 + -39 + -6a = 6 + -39

Combine like terms: 39 + -39 = 0
0 + -6a = 6 + -39
-6a = 6 + -39

Combine like terms: 6 + -39 = -33
-6a = -33

Divide each side by '-6'.
a = 5.5

Simplifying
a = 5.5