3(4-a)+3(2-a)=5

Solution for 3(4-a)+3(2-a)=5 equation:

Simplifying
3(4 + -1a) + 3(2 + -1a) = 5
(4 * 3 + -1a * 3) + 3(2 + -1a) = 5
(12 + -3a) + 3(2 + -1a) = 5
12 + -3a + (2 * 3 + -1a * 3) = 5
12 + -3a + (6 + -3a) = 5

Reorder the terms:
12 + 6 + -3a + -3a = 5

Combine like terms: 12 + 6 = 18
18 + -3a + -3a = 5

Combine like terms: -3a + -3a = -6a
18 + -6a = 5

Solving
18 + -6a = 5

Solving for variable 'a'.

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

Add '-18' to each side of the equation.
18 + -18 + -6a = 5 + -18

Combine like terms: 18 + -18 = 0
0 + -6a = 5 + -18
-6a = 5 + -18

Combine like terms: 5 + -18 = -13
-6a = -13

Divide each side by '-6'.
a = 2.166666667

Simplifying
a = 2.166666667