0.1x-0.3(3-x)=1.3

Solution for 0.1x-0.3(3-x)=1.3 equation:

Simplifying
0.1x + -0.3(3 + -1x) = 1.3
0.1x + (3 * -0.3 + -1x * -0.3) = 1.3
0.1x + (-0.9 + 0.3x) = 1.3

Reorder the terms:
-0.9 + 0.1x + 0.3x = 1.3

Combine like terms: 0.1x + 0.3x = 0.4x
-0.9 + 0.4x = 1.3

Solving
-0.9 + 0.4x = 1.3

Solving for variable 'x'.

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

Add '0.9' to each side of the equation.
-0.9 + 0.9 + 0.4x = 1.3 + 0.9

Combine like terms: -0.9 + 0.9 = 0.0
0.0 + 0.4x = 1.3 + 0.9
0.4x = 1.3 + 0.9

Combine like terms: 1.3 + 0.9 = 2.2
0.4x = 2.2

Divide each side by '0.4'.
x = 5.5

Simplifying
x = 5.5