-0.3=-S+0.6-8S

Solution for -0.3=-S+0.6-8S equation:

Simplifying
-0.3 = -1S + 0.6 + -8S

Reorder the terms:
-0.3 = 0.6 + -1S + -8S

Combine like terms: -1S + -8S = -9S
-0.3 = 0.6 + -9S

Solving
-0.3 = 0.6 + -9S

Solving for variable 'S'.

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

Add '9S' to each side of the equation.
-0.3 + 9S = 0.6 + -9S + 9S

Combine like terms: -9S + 9S = 0
-0.3 + 9S = 0.6 + 0
-0.3 + 9S = 0.6

Add '0.3' to each side of the equation.
-0.3 + 0.3 + 9S = 0.6 + 0.3

Combine like terms: -0.3 + 0.3 = 0.0
0.0 + 9S = 0.6 + 0.3
9S = 0.6 + 0.3

Combine like terms: 0.6 + 0.3 = 0.9
9S = 0.9

Divide each side by '9'.
S = 0.1

Simplifying
S = 0.1