15=43n-2.1(n-4)

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Solution for 15=43n-2.1(n-4) equation:


Simplifying
15 = 43n + -2.1(n + -4)

Reorder the terms:
15 = 43n + -2.1(-4 + n)
15 = 43n + (-4 * -2.1 + n * -2.1)
15 = 43n + (8.4 + -2.1n)

Reorder the terms:
15 = 8.4 + 43n + -2.1n

Combine like terms: 43n + -2.1n = 40.9n
15 = 8.4 + 40.9n

Solving
15 = 8.4 + 40.9n

Solving for variable 'n'.

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

Add '-40.9n' to each side of the equation.
15 + -40.9n = 8.4 + 40.9n + -40.9n

Combine like terms: 40.9n + -40.9n = 0.0
15 + -40.9n = 8.4 + 0.0
15 + -40.9n = 8.4

Add '-15' to each side of the equation.
15 + -15 + -40.9n = 8.4 + -15

Combine like terms: 15 + -15 = 0
0 + -40.9n = 8.4 + -15
-40.9n = 8.4 + -15

Combine like terms: 8.4 + -15 = -6.6
-40.9n = -6.6

Divide each side by '-40.9'.
n = 0.1613691932

Simplifying
n = 0.1613691932

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