-7(0.1x+0.3)-1.8=-0.4

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Solution for -7(0.1x+0.3)-1.8=-0.4 equation: 


Simplifying
-7(0.1x + 0.3) + -1.8 = -0.4

Reorder the terms:
-7(0.3 + 0.1x) + -1.8 = -0.4
(0.3 * -7 + 0.1x * -7) + -1.8 = -0.4
(-2.1 + -0.7x) + -1.8 = -0.4

Reorder the terms:
-2.1 + -1.8 + -0.7x = -0.4

Combine like terms: -2.1 + -1.8 = -3.9
-3.9 + -0.7x = -0.4

Solving
-3.9 + -0.7x = -0.4

Solving for variable 'x'.

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

Add '3.9' to each side of the equation.
-3.9 + 3.9 + -0.7x = -0.4 + 3.9

Combine like terms: -3.9 + 3.9 = 0.0
0.0 + -0.7x = -0.4 + 3.9
-0.7x = -0.4 + 3.9

Combine like terms: -0.4 + 3.9 = 3.5
-0.7x = 3.5

Divide each side by '-0.7'.
x = -5

Simplifying
x = -5

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