3c+21=10c-63

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Solution for 3c+21=10c-63 equation:


Simplifying
3c + 21 = 10c + -63

Reorder the terms:
21 + 3c = 10c + -63

Reorder the terms:
21 + 3c = -63 + 10c

Solving
21 + 3c = -63 + 10c

Solving for variable 'c'.

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

Add '-10c' to each side of the equation.
21 + 3c + -10c = -63 + 10c + -10c

Combine like terms: 3c + -10c = -7c
21 + -7c = -63 + 10c + -10c

Combine like terms: 10c + -10c = 0
21 + -7c = -63 + 0
21 + -7c = -63

Add '-21' to each side of the equation.
21 + -21 + -7c = -63 + -21

Combine like terms: 21 + -21 = 0
0 + -7c = -63 + -21
-7c = -63 + -21

Combine like terms: -63 + -21 = -84
-7c = -84

Divide each side by '-7'.
c = 12

Simplifying
c = 12

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