9(N-10)=90

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Solution for 9(N-10)=90 equation: 


Simplifying
9(N + -10) = 90

Reorder the terms:
9(-10 + N) = 90
(-10 * 9 + N * 9) = 90
(-90 + 9N) = 90

Solving
-90 + 9N = 90

Solving for variable 'N'.

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

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

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

Combine like terms: 90 + 90 = 180
9N = 180

Divide each side by '9'.
N = 20

Simplifying
N = 20

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