42=31-3c

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Solution for 42=31-3c equation:


Simplifying
42 = 31 + -3c

Solving
42 = 31 + -3c

Solving for variable 'c'.

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

Add '3c' to each side of the equation.
42 + 3c = 31 + -3c + 3c

Combine like terms: -3c + 3c = 0
42 + 3c = 31 + 0
42 + 3c = 31

Add '-42' to each side of the equation.
42 + -42 + 3c = 31 + -42

Combine like terms: 42 + -42 = 0
0 + 3c = 31 + -42
3c = 31 + -42

Combine like terms: 31 + -42 = -11
3c = -11

Divide each side by '3'.
c = -3.666666667

Simplifying
c = -3.666666667

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