3c-21=5c+9

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Solution for 3c-21=5c+9 equation:


Simplifying
3c + -21 = 5c + 9

Reorder the terms:
-21 + 3c = 5c + 9

Reorder the terms:
-21 + 3c = 9 + 5c

Solving
-21 + 3c = 9 + 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.
-21 + 3c + -5c = 9 + 5c + -5c

Combine like terms: 3c + -5c = -2c
-21 + -2c = 9 + 5c + -5c

Combine like terms: 5c + -5c = 0
-21 + -2c = 9 + 0
-21 + -2c = 9

Add '21' to each side of the equation.
-21 + 21 + -2c = 9 + 21

Combine like terms: -21 + 21 = 0
0 + -2c = 9 + 21
-2c = 9 + 21

Combine like terms: 9 + 21 = 30
-2c = 30

Divide each side by '-2'.
c = -15

Simplifying
c = -15

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