0.20(100-x)=12

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Solution for 0.20(100-x)=12 equation: 


Simplifying
0.20(100 + -1x) = 12
(100 * 0.20 + -1x * 0.20) = 12
(20 + -0.2x) = 12

Solving
20 + -0.2x = 12

Solving for variable 'x'.

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

Add '-20' to each side of the equation.
20 + -20 + -0.2x = 12 + -20

Combine like terms: 20 + -20 = 0
0 + -0.2x = 12 + -20
-0.2x = 12 + -20

Combine like terms: 12 + -20 = -8
-0.2x = -8

Divide each side by '-0.2'.
x = 40

Simplifying
x = 40

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