21-3c-7=6c-2-c

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Solution for 21-3c-7=6c-2-c equation:


Simplifying
21 + -3c + -7 = 6c + -2 + -1c

Reorder the terms:
21 + -7 + -3c = 6c + -2 + -1c

Combine like terms: 21 + -7 = 14
14 + -3c = 6c + -2 + -1c

Reorder the terms:
14 + -3c = -2 + 6c + -1c

Combine like terms: 6c + -1c = 5c
14 + -3c = -2 + 5c

Solving
14 + -3c = -2 + 5c

Solving for variable 'c'.

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

Add '-5c' to each side of the equation.
14 + -3c + -5c = -2 + 5c + -5c

Combine like terms: -3c + -5c = -8c
14 + -8c = -2 + 5c + -5c

Combine like terms: 5c + -5c = 0
14 + -8c = -2 + 0
14 + -8c = -2

Add '-14' to each side of the equation.
14 + -14 + -8c = -2 + -14

Combine like terms: 14 + -14 = 0
0 + -8c = -2 + -14
-8c = -2 + -14

Combine like terms: -2 + -14 = -16
-8c = -16

Divide each side by '-8'.
c = 2

Simplifying
c = 2

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