-2.1(n+3.9)=-2.5n-6.39

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Solution for -2.1(n+3.9)=-2.5n-6.39 equation: 


Simplifying
-2.1(n + 3.9) = -2.5n + -6.39

Reorder the terms:
-2.1(3.9 + n) = -2.5n + -6.39
(3.9 * -2.1 + n * -2.1) = -2.5n + -6.39
(-8.19 + -2.1n) = -2.5n + -6.39

Reorder the terms:
-8.19 + -2.1n = -6.39 + -2.5n

Solving
-8.19 + -2.1n = -6.39 + -2.5n

Solving for variable 'n'.

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

Add '2.5n' to each side of the equation.
-8.19 + -2.1n + 2.5n = -6.39 + -2.5n + 2.5n

Combine like terms: -2.1n + 2.5n = 0.4n
-8.19 + 0.4n = -6.39 + -2.5n + 2.5n

Combine like terms: -2.5n + 2.5n = 0.0
-8.19 + 0.4n = -6.39 + 0.0
-8.19 + 0.4n = -6.39

Add '8.19' to each side of the equation.
-8.19 + 8.19 + 0.4n = -6.39 + 8.19

Combine like terms: -8.19 + 8.19 = 0.00
0.00 + 0.4n = -6.39 + 8.19
0.4n = -6.39 + 8.19

Combine like terms: -6.39 + 8.19 = 1.8
0.4n = 1.8

Divide each side by '0.4'.
n = 4.5

Simplifying
n = 4.5

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