0.1(x+20)+0.1=3

Solution for 0.1(x+20)+0.1=3 equation:

Simplifying
0.1(x + 20) + 0.1 = 3

Reorder the terms:
0.1(20 + x) + 0.1 = 3
(20 * 0.1 + x * 0.1) + 0.1 = 3
(2 + 0.1x) + 0.1 = 3

Reorder the terms:
2 + 0.1 + 0.1x = 3

Combine like terms: 2 + 0.1 = 2.1
2.1 + 0.1x = 3

Solving
2.1 + 0.1x = 3

Solving for variable 'x'.

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

Add '-2.1' to each side of the equation.
2.1 + -2.1 + 0.1x = 3 + -2.1

Combine like terms: 2.1 + -2.1 = 0.0
0.0 + 0.1x = 3 + -2.1
0.1x = 3 + -2.1

Combine like terms: 3 + -2.1 = 0.9
0.1x = 0.9

Divide each side by '0.1'.
x = 9

Simplifying
x = 9