63=c-21+2c

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Solution for 63=c-21+2c equation:


Simplifying
63 = c + -21 + 2c

Reorder the terms:
63 = -21 + c + 2c

Combine like terms: c + 2c = 3c
63 = -21 + 3c

Solving
63 = -21 + 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.
63 + -3c = -21 + 3c + -3c

Combine like terms: 3c + -3c = 0
63 + -3c = -21 + 0
63 + -3c = -21

Add '-63' to each side of the equation.
63 + -63 + -3c = -21 + -63

Combine like terms: 63 + -63 = 0
0 + -3c = -21 + -63
-3c = -21 + -63

Combine like terms: -21 + -63 = -84
-3c = -84

Divide each side by '-3'.
c = 28

Simplifying
c = 28

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