15=-8(n-1)+9

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Solution for 15=-8(n-1)+9 equation: 


Simplifying
15 = -8(n + -1) + 9

Reorder the terms:
15 = -8(-1 + n) + 9
15 = (-1 * -8 + n * -8) + 9
15 = (8 + -8n) + 9

Reorder the terms:
15 = 8 + 9 + -8n

Combine like terms: 8 + 9 = 17
15 = 17 + -8n

Solving
15 = 17 + -8n

Solving for variable 'n'.

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

Add '8n' to each side of the equation.
15 + 8n = 17 + -8n + 8n

Combine like terms: -8n + 8n = 0
15 + 8n = 17 + 0
15 + 8n = 17

Add '-15' to each side of the equation.
15 + -15 + 8n = 17 + -15

Combine like terms: 15 + -15 = 0
0 + 8n = 17 + -15
8n = 17 + -15

Combine like terms: 17 + -15 = 2
8n = 2

Divide each side by '8'.
n = 0.25

Simplifying
n = 0.25

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