20c-20c+5c-2c=9

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Solution for 20c-20c+5c-2c=9 equation: 



20c-20c+5c-2c=9

We move all terms to the left:

20c-20c+5c-2c-(9)=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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