0.9x+0.3(x+12)=

Solution for 0.9x+0.3(x+12)= equation:

Simplifying
0.9x + 0.3(x + 12) = 0

Reorder the terms:
0.9x + 0.3(12 + x) = 0
0.9x + (12 * 0.3 + x * 0.3) = 0
0.9x + (3.6 + 0.3x) = 0

Reorder the terms:
3.6 + 0.9x + 0.3x = 0

Combine like terms: 0.9x + 0.3x = 1.2x
3.6 + 1.2x = 0

Solving
3.6 + 1.2x = 0

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 + 1.2x = 0 + -3.6

Combine like terms: 3.6 + -3.6 = 0.0
0.0 + 1.2x = 0 + -3.6
1.2x = 0 + -3.6

Combine like terms: 0 + -3.6 = -3.6
1.2x = -3.6

Divide each side by '1.2'.
x = -3

Simplifying
x = -3