3(0.6)3(0.4)+3(0.4)3(0.6)=x

Solution for 3(0.6)3(0.4)+3(0.4)3(0.6)=x equation:

Simplifying
3(0.6) * 3(0.4) + 3(0.4) * 3(0.6) = x

Multiply 3 * 0.6
1.8 * 3 * 0.4 + 3(0.4) * 3(0.6) = x

Multiply 1.8 * 3
5.4 * 0.4 + 3(0.4) * 3(0.6) = x

Multiply 5.4 * 0.4
2.16 + 3(0.4) * 3(0.6) = x

Multiply 3 * 0.4
2.16 + 1.2 * 3 * 0.6 = x

Multiply 1.2 * 3
2.16 + 3.6 * 0.6 = x

Multiply 3.6 * 0.6
2.16 + 2.16 = x

Combine like terms: 2.16 + 2.16 = 4.32
4.32 = x

Solving
4.32 = x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
4.32 + -1x = x + -1x

Combine like terms: x + -1x = 0
4.32 + -1x = 0

Add '-4.32' to each side of the equation.
4.32 + -4.32 + -1x = 0 + -4.32

Combine like terms: 4.32 + -4.32 = 0.00
0.00 + -1x = 0 + -4.32
-1x = 0 + -4.32

Combine like terms: 0 + -4.32 = -4.32
-1x = -4.32

Divide each side by '-1'.
x = 4.32

Simplifying
x = 4.32