[3*(6+2)]+6*3=a

Solution for [3*(6+2)]+6*3=a equation:

Simplifying
[3(6 + 2)] + 6 * 3 = a

Combine like terms: 6 + 2 = 8
[3(8)] + 6 * 3 = a

Multiply 3 * 8
[24] + 6 * 3 = a
24 + 6 * 3 = a

Multiply 6 * 3
24 + 18 = a

Combine like terms: 24 + 18 = 42
42 = a

Solving
42 = a

Solving for variable 'a'.

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

Add '-1a' to each side of the equation.
42 + -1a = a + -1a

Combine like terms: a + -1a = 0
42 + -1a = 0

Add '-42' to each side of the equation.
42 + -42 + -1a = 0 + -42

Combine like terms: 42 + -42 = 0
0 + -1a = 0 + -42
-1a = 0 + -42

Combine like terms: 0 + -42 = -42
-1a = -42

Divide each side by '-1'.
a = 42

Simplifying
a = 42