42=18-4c

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Solution for 42=18-4c equation:


Simplifying
42 = 18 + -4c

Solving
42 = 18 + -4c

Solving for variable 'c'.

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

Add '4c' to each side of the equation.
42 + 4c = 18 + -4c + 4c

Combine like terms: -4c + 4c = 0
42 + 4c = 18 + 0
42 + 4c = 18

Add '-42' to each side of the equation.
42 + -42 + 4c = 18 + -42

Combine like terms: 42 + -42 = 0
0 + 4c = 18 + -42
4c = 18 + -42

Combine like terms: 18 + -42 = -24
4c = -24

Divide each side by '4'.
c = -6

Simplifying
c = -6

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