9-7n=21

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Solution for 9-7n=21 equation:


Simplifying
9 + -7n = 21

Solving
9 + -7n = 21

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 + -7n = 21 + -9

Combine like terms: 9 + -9 = 0
0 + -7n = 21 + -9
-7n = 21 + -9

Combine like terms: 21 + -9 = 12
-7n = 12

Divide each side by '-7'.
n = -1.714285714

Simplifying
n = -1.714285714

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