3-4c=-81

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Solution for 3-4c=-81 equation: 


Simplifying
3 + -4c = -81

Solving
3 + -4c = -81

Solving for variable 'c'.

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

Add '-3' to each side of the equation.
3 + -3 + -4c = -81 + -3

Combine like terms: 3 + -3 = 0
0 + -4c = -81 + -3
-4c = -81 + -3

Combine like terms: -81 + -3 = -84
-4c = -84

Divide each side by '-4'.
c = 21

Simplifying
c = 21

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