0.4n-3=-1

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Solution for 0.4n-3=-1 equation: 


Simplifying
0.4n + -3 = -1

Reorder the terms:
-3 + 0.4n = -1

Solving
-3 + 0.4n = -1

Solving for variable 'n'.

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

Add '3' to each side of the equation.
-3 + 3 + 0.4n = -1 + 3

Combine like terms: -3 + 3 = 0
0 + 0.4n = -1 + 3
0.4n = -1 + 3

Combine like terms: -1 + 3 = 2
0.4n = 2

Divide each side by '0.4'.
n = 5

Simplifying
n = 5

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