-6c-3-9c=12

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Solution for -6c-3-9c=12 equation:


Simplifying
-6c + -3 + -9c = 12

Reorder the terms:
-3 + -6c + -9c = 12

Combine like terms: -6c + -9c = -15c
-3 + -15c = 12

Solving
-3 + -15c = 12

Solving for variable 'c'.

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

Add '3' to each side of the equation.
-3 + 3 + -15c = 12 + 3

Combine like terms: -3 + 3 = 0
0 + -15c = 12 + 3
-15c = 12 + 3

Combine like terms: 12 + 3 = 15
-15c = 15

Divide each side by '-15'.
c = -1

Simplifying
c = -1

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