3c+21=12c+3

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Solution for 3c+21=12c+3 equation:


Simplifying
3c + 21 = 12c + 3

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

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

Solving
21 + 3c = 3 + 12c

Solving for variable 'c'.

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

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

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

Combine like terms: 12c + -12c = 0
21 + -9c = 3 + 0
21 + -9c = 3

Add '-21' to each side of the equation.
21 + -21 + -9c = 3 + -21

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

Combine like terms: 3 + -21 = -18
-9c = -18

Divide each side by '-9'.
c = 2

Simplifying
c = 2

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