-0.3(0.7x-0.9)=-1.89

Solution for -0.3(0.7x-0.9)=-1.89 equation:

Simplifying
-0.3(0.7x + -0.9) = -1.89

Reorder the terms:
-0.3(-0.9 + 0.7x) = -1.89
(-0.9 * -0.3 + 0.7x * -0.3) = -1.89
(0.27 + -0.21x) = -1.89

Solving
0.27 + -0.21x = -1.89

Solving for variable 'x'.

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

Add '-0.27' to each side of the equation.
0.27 + -0.27 + -0.21x = -1.89 + -0.27

Combine like terms: 0.27 + -0.27 = 0.00
0.00 + -0.21x = -1.89 + -0.27
-0.21x = -1.89 + -0.27

Combine like terms: -1.89 + -0.27 = -2.16
-0.21x = -2.16

Divide each side by '-0.21'.
x = 10.28571429

Simplifying
x = 10.28571429