3(2X+6)-9=42

Solution for 3(2X+6)-9=42 equation:

Simplifying
3(2X + 6) + -9 = 42

Reorder the terms:
3(6 + 2X) + -9 = 42
(6 * 3 + 2X * 3) + -9 = 42
(18 + 6X) + -9 = 42

Reorder the terms:
18 + -9 + 6X = 42

Combine like terms: 18 + -9 = 9
9 + 6X = 42

Solving
9 + 6X = 42

Solving for variable 'X'.

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

Add '-9' to each side of the equation.
9 + -9 + 6X = 42 + -9

Combine like terms: 9 + -9 = 0
0 + 6X = 42 + -9
6X = 42 + -9

Combine like terms: 42 + -9 = 33
6X = 33

Divide each side by '6'.
X = 5.5

Simplifying
X = 5.5