2c-9+18c=-9+20c

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Solution for 2c-9+18c=-9+20c equation: 



2c-9+18c=-9+20c

We move all terms to the left:

2c-9+18c-(-9+20c)=0

We add all the numbers together, and all the variables

2c+18c-(20c-9)-9=0

We add all the numbers together, and all the variables

20c-(20c-9)-9=0

We get rid of parentheses

20c-20c+9-9=0

We add all the numbers together, and all the variables

=0

c=0/1

c=0

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