15=43n-21(n-4)

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Solution for 15=43n-21(n-4) equation:


Simplifying
15 = 43n + -21(n + -4)

Reorder the terms:
15 = 43n + -21(-4 + n)
15 = 43n + (-4 * -21 + n * -21)
15 = 43n + (84 + -21n)

Reorder the terms:
15 = 84 + 43n + -21n

Combine like terms: 43n + -21n = 22n
15 = 84 + 22n

Solving
15 = 84 + 22n

Solving for variable 'n'.

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

Add '-22n' to each side of the equation.
15 + -22n = 84 + 22n + -22n

Combine like terms: 22n + -22n = 0
15 + -22n = 84 + 0
15 + -22n = 84

Add '-15' to each side of the equation.
15 + -15 + -22n = 84 + -15

Combine like terms: 15 + -15 = 0
0 + -22n = 84 + -15
-22n = 84 + -15

Combine like terms: 84 + -15 = 69
-22n = 69

Divide each side by '-22'.
n = -3.136363636

Simplifying
n = -3.136363636

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