9(n-1)=-90

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Solution for 9(n-1)=-90 equation: 


Simplifying
9(n + -1) = -90

Reorder the terms:
9(-1 + n) = -90
(-1 * 9 + n * 9) = -90
(-9 + 9n) = -90

Solving
-9 + 9n = -90

Solving for variable 'n'.

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

Add '9' to each side of the equation.
-9 + 9 + 9n = -90 + 9

Combine like terms: -9 + 9 = 0
0 + 9n = -90 + 9
9n = -90 + 9

Combine like terms: -90 + 9 = -81
9n = -81

Divide each side by '9'.
n = -9

Simplifying
n = -9

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