3c-9=-18

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Solution for 3c-9=-18 equation: 



3c-9=-18

We move all terms to the left:

3c-9-(-18)=0

We add all the numbers together, and all the variables

3c+9=0

We move all terms containing c to the left, all other terms to the right

3c=-9

c=-9/3

c=-3

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