31=6+12+c

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Solution for 31=6+12+c equation: 


Simplifying
31 = 6 + 12 + c

Combine like terms: 6 + 12 = 18
31 = 18 + c

Solving
31 = 18 + 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.
31 + -1c = 18 + c + -1c

Combine like terms: c + -1c = 0
31 + -1c = 18 + 0
31 + -1c = 18

Add '-31' to each side of the equation.
31 + -31 + -1c = 18 + -31

Combine like terms: 31 + -31 = 0
0 + -1c = 18 + -31
-1c = 18 + -31

Combine like terms: 18 + -31 = -13
-1c = -13

Divide each side by '-1'.
c = 13

Simplifying
c = 13

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