4(a+3)-2=42

Solution for 4(a+3)-2=42 equation:

Simplifying
4(a + 3) + -2 = 42

Reorder the terms:
4(3 + a) + -2 = 42
(3 * 4 + a * 4) + -2 = 42
(12 + 4a) + -2 = 42

Reorder the terms:
12 + -2 + 4a = 42

Combine like terms: 12 + -2 = 10
10 + 4a = 42

Solving
10 + 4a = 42

Solving for variable 'a'.

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

Add '-10' to each side of the equation.
10 + -10 + 4a = 42 + -10

Combine like terms: 10 + -10 = 0
0 + 4a = 42 + -10
4a = 42 + -10

Combine like terms: 42 + -10 = 32
4a = 32

Divide each side by '4'.
a = 8

Simplifying
a = 8