0.3(3+2x)+1.2x=4.5

Solution for 0.3(3+2x)+1.2x=4.5 equation:

Simplifying
0.3(3 + 2x) + 1.2x = 4.5
(3 * 0.3 + 2x * 0.3) + 1.2x = 4.5
(0.9 + 0.6x) + 1.2x = 4.5

Combine like terms: 0.6x + 1.2x = 1.8x
0.9 + 1.8x = 4.5

Solving
0.9 + 1.8x = 4.5

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 + 1.8x = 4.5 + -0.9

Combine like terms: 0.9 + -0.9 = 0.0
0.0 + 1.8x = 4.5 + -0.9
1.8x = 4.5 + -0.9

Combine like terms: 4.5 + -0.9 = 3.6
1.8x = 3.6

Divide each side by '1.8'.
x = 2

Simplifying
x = 2