9+q=21

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Solution for 9+q=21 equation:


Simplifying
9 + q = 21

Solving
9 + q = 21

Solving for variable 'q'.

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

Add '-9' to each side of the equation.
9 + -9 + q = 21 + -9

Combine like terms: 9 + -9 = 0
0 + q = 21 + -9
q = 21 + -9

Combine like terms: 21 + -9 = 12
q = 12

Simplifying
q = 12

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