12+9c=12c-18

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Solution for 12+9c=12c-18 equation:


Simplifying
12 + 9c = 12c + -18

Reorder the terms:
12 + 9c = -18 + 12c

Solving
12 + 9c = -18 + 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.
12 + 9c + -12c = -18 + 12c + -12c

Combine like terms: 9c + -12c = -3c
12 + -3c = -18 + 12c + -12c

Combine like terms: 12c + -12c = 0
12 + -3c = -18 + 0
12 + -3c = -18

Add '-12' to each side of the equation.
12 + -12 + -3c = -18 + -12

Combine like terms: 12 + -12 = 0
0 + -3c = -18 + -12
-3c = -18 + -12

Combine like terms: -18 + -12 = -30
-3c = -30

Divide each side by '-3'.
c = 10

Simplifying
c = 10

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