20-0.4n=3.2

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Solution for 20-0.4n=3.2 equation: 


Simplifying
20 + -0.4n = 3.2

Solving
20 + -0.4n = 3.2

Solving for variable 'n'.

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

Add '-20' to each side of the equation.
20 + -20 + -0.4n = 3.2 + -20

Combine like terms: 20 + -20 = 0
0 + -0.4n = 3.2 + -20
-0.4n = 3.2 + -20

Combine like terms: 3.2 + -20 = -16.8
-0.4n = -16.8

Divide each side by '-0.4'.
n = 42

Simplifying
n = 42

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