12=3(a+2)

Solution for 12=3(a+2) equation:

Simplifying
12 = 3(a + 2)

Reorder the terms:
12 = 3(2 + a)
12 = (2 * 3 + a * 3)
12 = (6 + 3a)

Solving
12 = 6 + 3a

Solving for variable 'a'.

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

Add '-3a' to each side of the equation.
12 + -3a = 6 + 3a + -3a

Combine like terms: 3a + -3a = 0
12 + -3a = 6 + 0
12 + -3a = 6

Add '-12' to each side of the equation.
12 + -12 + -3a = 6 + -12

Combine like terms: 12 + -12 = 0
0 + -3a = 6 + -12
-3a = 6 + -12

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

Divide each side by '-3'.
a = 2

Simplifying
a = 2