4.3n-2.1(n-4)=15

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


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

Reorder the terms:
4.3n + -2.1(-4 + n) = 15
4.3n + (-4 * -2.1 + n * -2.1) = 15
4.3n + (8.4 + -2.1n) = 15

Reorder the terms:
8.4 + 4.3n + -2.1n = 15

Combine like terms: 4.3n + -2.1n = 2.2n
8.4 + 2.2n = 15

Solving
8.4 + 2.2n = 15

Solving for variable 'n'.

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

Add '-8.4' to each side of the equation.
8.4 + -8.4 + 2.2n = 15 + -8.4

Combine like terms: 8.4 + -8.4 = 0.0
0.0 + 2.2n = 15 + -8.4
2.2n = 15 + -8.4

Combine like terms: 15 + -8.4 = 6.6
2.2n = 6.6

Divide each side by '2.2'.
n = 3

Simplifying
n = 3

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