21=8+6+c

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Solution for 21=8+6+c equation: 


Simplifying
21 = 8 + 6 + c

Combine like terms: 8 + 6 = 14
21 = 14 + c

Solving
21 = 14 + c

Solving for variable 'c'.

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

Add '-1c' to each side of the equation.
21 + -1c = 14 + c + -1c

Combine like terms: c + -1c = 0
21 + -1c = 14 + 0
21 + -1c = 14

Add '-21' to each side of the equation.
21 + -21 + -1c = 14 + -21

Combine like terms: 21 + -21 = 0
0 + -1c = 14 + -21
-1c = 14 + -21

Combine like terms: 14 + -21 = -7
-1c = -7

Divide each side by '-1'.
c = 7

Simplifying
c = 7

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