15=4.3n-2.1n-4

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Solution for 15=4.3n-2.1n-4 equation: 


Simplifying
15 = 4.3n + -2.1n + -4

Reorder the terms:
15 = -4 + 4.3n + -2.1n

Combine like terms: 4.3n + -2.1n = 2.2n
15 = -4 + 2.2n

Solving
15 = -4 + 2.2n

Solving for variable 'n'.

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

Add '-2.2n' to each side of the equation.
15 + -2.2n = -4 + 2.2n + -2.2n

Combine like terms: 2.2n + -2.2n = 0.0
15 + -2.2n = -4 + 0.0
15 + -2.2n = -4

Add '-15' to each side of the equation.
15 + -15 + -2.2n = -4 + -15

Combine like terms: 15 + -15 = 0
0 + -2.2n = -4 + -15
-2.2n = -4 + -15

Combine like terms: -4 + -15 = -19
-2.2n = -19

Divide each side by '-2.2'.
n = 8.636363636

Simplifying
n = 8.636363636

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