1.8*0.4+x*0.6=4

Solution for 1.8*0.4+x*0.6=4 equation:

Simplifying
1.8 * 0.4 + x * 0.6 = 4

Multiply 1.8 * 0.4
0.72 + x * 0.6 = 4

Reorder the terms for easier multiplication:
0.72 + 0.6x = 4

Solving
0.72 + 0.6x = 4

Solving for variable 'x'.

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

Add '-0.72' to each side of the equation.
0.72 + -0.72 + 0.6x = 4 + -0.72

Combine like terms: 0.72 + -0.72 = 0.00
0.00 + 0.6x = 4 + -0.72
0.6x = 4 + -0.72

Combine like terms: 4 + -0.72 = 3.28
0.6x = 3.28

Divide each side by '0.6'.
x = 5.466666667

Simplifying
x = 5.466666667