3c-12-21=

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Solution for 3c-12-21= equation:


Simplifying
3c + -12 + -21 = 0

Reorder the terms:
-12 + -21 + 3c = 0

Combine like terms: -12 + -21 = -33
-33 + 3c = 0

Solving
-33 + 3c = 0

Solving for variable 'c'.

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

Add '33' to each side of the equation.
-33 + 33 + 3c = 0 + 33

Combine like terms: -33 + 33 = 0
0 + 3c = 0 + 33
3c = 0 + 33

Combine like terms: 0 + 33 = 33
3c = 33

Divide each side by '3'.
c = 11

Simplifying
c = 11

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