15=4.3n-21(n-4)

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Solution for 15=4.3n-21(n-4) equation:


Simplifying
15 = 4.3n + -21(n + -4)

Reorder the terms:
15 = 4.3n + -21(-4 + n)
15 = 4.3n + (-4 * -21 + n * -21)
15 = 4.3n + (84 + -21n)

Reorder the terms:
15 = 84 + 4.3n + -21n

Combine like terms: 4.3n + -21n = -16.7n
15 = 84 + -16.7n

Solving
15 = 84 + -16.7n

Solving for variable 'n'.

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

Add '16.7n' to each side of the equation.
15 + 16.7n = 84 + -16.7n + 16.7n

Combine like terms: -16.7n + 16.7n = 0.0
15 + 16.7n = 84 + 0.0
15 + 16.7n = 84

Add '-15' to each side of the equation.
15 + -15 + 16.7n = 84 + -15

Combine like terms: 15 + -15 = 0
0 + 16.7n = 84 + -15
16.7n = 84 + -15

Combine like terms: 84 + -15 = 69
16.7n = 69

Divide each side by '16.7'.
n = 4.131736527

Simplifying
n = 4.131736527

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