12(3.6)+x(4.2)=

Solution for 12(3.6)+x(4.2)= equation:

Simplifying
12(3.6) + x(4.2) = 0

Multiply 12 * 3.6
43.2 + x(4.2) = 0

Reorder the terms for easier multiplication:
43.2 + 4.2x = 0

Solving
43.2 + 4.2x = 0

Solving for variable 'x'.

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

Add '-43.2' to each side of the equation.
43.2 + -43.2 + 4.2x = 0 + -43.2

Combine like terms: 43.2 + -43.2 = 0.0
0.0 + 4.2x = 0 + -43.2
4.2x = 0 + -43.2

Combine like terms: 0 + -43.2 = -43.2
4.2x = -43.2

Divide each side by '4.2'.
x = -10.28571429

Simplifying
x = -10.28571429