.40n+4=20

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Solution for .40n+4=20 equation: 


Simplifying
0.40n + 4 = 20

Reorder the terms:
4 + 0.40n = 20

Solving
4 + 0.40n = 20

Solving for variable 'n'.

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

Add '-4' to each side of the equation.
4 + -4 + 0.40n = 20 + -4

Combine like terms: 4 + -4 = 0
0 + 0.40n = 20 + -4
0.40n = 20 + -4

Combine like terms: 20 + -4 = 16
0.40n = 16

Divide each side by '0.40'.
n = 40

Simplifying
n = 40

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