.4(3+2x)+1.3x=3.3

Solution for .4(3+2x)+1.3x=3.3 equation:

Simplifying
0.4(3 + 2x) + 1.3x = 3.3
(3 * 0.4 + 2x * 0.4) + 1.3x = 3.3
(1.2 + 0.8x) + 1.3x = 3.3

Combine like terms: 0.8x + 1.3x = 2.1x
1.2 + 2.1x = 3.3

Solving
1.2 + 2.1x = 3.3

Solving for variable 'x'.

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

Add '-1.2' to each side of the equation.
1.2 + -1.2 + 2.1x = 3.3 + -1.2

Combine like terms: 1.2 + -1.2 = 0.0
0.0 + 2.1x = 3.3 + -1.2
2.1x = 3.3 + -1.2

Combine like terms: 3.3 + -1.2 = 2.1
2.1x = 2.1

Divide each side by '2.1'.
x = 1

Simplifying
x = 1