C+21.9=8.4

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Solution for C+21.9=8.4 equation: 


Simplifying
C + 21.9 = 8.4

Reorder the terms:
21.9 + C = 8.4

Solving
21.9 + C = 8.4

Solving for variable 'C'.

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

Add '-21.9' to each side of the equation.
21.9 + -21.9 + C = 8.4 + -21.9

Combine like terms: 21.9 + -21.9 = 0.0
0.0 + C = 8.4 + -21.9
C = 8.4 + -21.9

Combine like terms: 8.4 + -21.9 = -13.5
C = -13.5

Simplifying
C = -13.5

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