12c-21=3c

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Solution for 12c-21=3c equation:


Simplifying
12c + -21 = 3c

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

Solving
-21 + 12c = 3c

Solving for variable 'c'.

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

Add '-3c' to each side of the equation.
-21 + 12c + -3c = 3c + -3c

Combine like terms: 12c + -3c = 9c
-21 + 9c = 3c + -3c

Combine like terms: 3c + -3c = 0
-21 + 9c = 0

Add '21' to each side of the equation.
-21 + 21 + 9c = 0 + 21

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

Combine like terms: 0 + 21 = 21
9c = 21

Divide each side by '9'.
c = 2.333333333

Simplifying
c = 2.333333333

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