10n-9n-21=-6

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Solution for 10n-9n-21=-6 equation:


Simplifying
10n + -9n + -21 = -6

Reorder the terms:
-21 + 10n + -9n = -6

Combine like terms: 10n + -9n = 1n
-21 + 1n = -6

Solving
-21 + 1n = -6

Solving for variable 'n'.

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

Add '21' to each side of the equation.
-21 + 21 + 1n = -6 + 21

Combine like terms: -21 + 21 = 0
0 + 1n = -6 + 21
1n = -6 + 21

Combine like terms: -6 + 21 = 15
1n = 15

Divide each side by '1'.
n = 15

Simplifying
n = 15

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