21-2c=3c+6

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


Simplifying
21 + -2c = 3c + 6

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

Solving
21 + -2c = 6 + 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 + -2c + -3c = 6 + 3c + -3c

Combine like terms: -2c + -3c = -5c
21 + -5c = 6 + 3c + -3c

Combine like terms: 3c + -3c = 0
21 + -5c = 6 + 0
21 + -5c = 6

Add '-21' to each side of the equation.
21 + -21 + -5c = 6 + -21

Combine like terms: 21 + -21 = 0
0 + -5c = 6 + -21
-5c = 6 + -21

Combine like terms: 6 + -21 = -15
-5c = -15

Divide each side by '-5'.
c = 3

Simplifying
c = 3

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