0.4-0.2(3-x)=1.8

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Solution for 0.4-0.2(3-x)=1.8 equation: 


Simplifying
0.4 + -0.2(3 + -1x) = 1.8
0.4 + (3 * -0.2 + -1x * -0.2) = 1.8
0.4 + (-0.6 + 0.2x) = 1.8

Combine like terms: 0.4 + -0.6 = -0.2
-0.2 + 0.2x = 1.8

Solving
-0.2 + 0.2x = 1.8

Solving for variable 'x'.

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

Add '0.2' to each side of the equation.
-0.2 + 0.2 + 0.2x = 1.8 + 0.2

Combine like terms: -0.2 + 0.2 = 0.0
0.0 + 0.2x = 1.8 + 0.2
0.2x = 1.8 + 0.2

Combine like terms: 1.8 + 0.2 = 2
0.2x = 2

Divide each side by '0.2'.
x = 10

Simplifying
x = 10

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