9-3c=12

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Solution for 9-3c=12 equation: 


Simplifying
9 + -3c = 12

Solving
9 + -3c = 12

Solving for variable 'c'.

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

Add '-9' to each side of the equation.
9 + -9 + -3c = 12 + -9

Combine like terms: 9 + -9 = 0
0 + -3c = 12 + -9
-3c = 12 + -9

Combine like terms: 12 + -9 = 3
-3c = 3

Divide each side by '-3'.
c = -1

Simplifying
c = -1

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