21=8c-3

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Solution for 21=8c-3 equation:


Simplifying
21 = 8c + -3

Reorder the terms:
21 = -3 + 8c

Solving
21 = -3 + 8c

Solving for variable 'c'.

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

Add '-8c' to each side of the equation.
21 + -8c = -3 + 8c + -8c

Combine like terms: 8c + -8c = 0
21 + -8c = -3 + 0
21 + -8c = -3

Add '-21' to each side of the equation.
21 + -21 + -8c = -3 + -21

Combine like terms: 21 + -21 = 0
0 + -8c = -3 + -21
-8c = -3 + -21

Combine like terms: -3 + -21 = -24
-8c = -24

Divide each side by '-8'.
c = 3

Simplifying
c = 3

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