3c-9=-72

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Solution for 3c-9=-72 equation: 


Simplifying
3c + -9 = -72

Reorder the terms:
-9 + 3c = -72

Solving
-9 + 3c = -72

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 = -72 + 9

Combine like terms: -9 + 9 = 0
0 + 3c = -72 + 9
3c = -72 + 9

Combine like terms: -72 + 9 = -63
3c = -63

Divide each side by '3'.
c = -21

Simplifying
c = -21

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