3(c-1)=18

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Solution for 3(c-1)=18 equation: 


Simplifying
3(c + -1) = 18

Reorder the terms:
3(-1 + c) = 18
(-1 * 3 + c * 3) = 18
(-3 + 3c) = 18

Solving
-3 + 3c = 18

Solving for variable 'c'.

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

Add '3' to each side of the equation.
-3 + 3 + 3c = 18 + 3

Combine like terms: -3 + 3 = 0
0 + 3c = 18 + 3
3c = 18 + 3

Combine like terms: 18 + 3 = 21
3c = 21

Divide each side by '3'.
c = 7

Simplifying
c = 7

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