0.12(x+30)=42

Solution for 0.12(x+30)=42 equation:

Simplifying
0.12(x + 30) = 42

Reorder the terms:
0.12(30 + x) = 42
(30 * 0.12 + x * 0.12) = 42
(3.6 + 0.12x) = 42

Solving
3.6 + 0.12x = 42

Solving for variable 'x'.

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

Add '-3.6' to each side of the equation.
3.6 + -3.6 + 0.12x = 42 + -3.6

Combine like terms: 3.6 + -3.6 = 0.0
0.0 + 0.12x = 42 + -3.6
0.12x = 42 + -3.6

Combine like terms: 42 + -3.6 = 38.4
0.12x = 38.4

Divide each side by '0.12'.
x = 320

Simplifying
x = 320