-7(0.1x+0.3)-0.9=-0.2

Solution for -7(0.1x+0.3)-0.9=-0.2 equation:

Simplifying
-7(0.1x + 0.3) + -0.9 = -0.2

Reorder the terms:
-7(0.3 + 0.1x) + -0.9 = -0.2
(0.3 * -7 + 0.1x * -7) + -0.9 = -0.2
(-2.1 + -0.7x) + -0.9 = -0.2

Reorder the terms:
-2.1 + -0.9 + -0.7x = -0.2

Combine like terms: -2.1 + -0.9 = -3
-3 + -0.7x = -0.2

Solving
-3 + -0.7x = -0.2

Solving for variable 'x'.

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

Add '3' to each side of the equation.
-3 + 3 + -0.7x = -0.2 + 3

Combine like terms: -3 + 3 = 0
0 + -0.7x = -0.2 + 3
-0.7x = -0.2 + 3

Combine like terms: -0.2 + 3 = 2.8
-0.7x = 2.8

Divide each side by '-0.7'.
x = -4

Simplifying
x = -4