0.2+0.9=0.3-0.1x

Solution for 0.2+0.9=0.3-0.1x equation:

Simplifying
0.2 + 0.9 = 0.3 + -0.1x

Combine like terms: 0.2 + 0.9 = 1.1
1.1 = 0.3 + -0.1x

Solving
1.1 = 0.3 + -0.1x

Solving for variable 'x'.

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

Add '0.1x' to each side of the equation.
1.1 + 0.1x = 0.3 + -0.1x + 0.1x

Combine like terms: -0.1x + 0.1x = 0.0
1.1 + 0.1x = 0.3 + 0.0
1.1 + 0.1x = 0.3

Add '-1.1' to each side of the equation.
1.1 + -1.1 + 0.1x = 0.3 + -1.1

Combine like terms: 1.1 + -1.1 = 0.0
0.0 + 0.1x = 0.3 + -1.1
0.1x = 0.3 + -1.1

Combine like terms: 0.3 + -1.1 = -0.8
0.1x = -0.8

Divide each side by '0.1'.
x = -8

Simplifying
x = -8