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6.80-0.25c=0.30c
We move all terms to the left:
6.80-0.25c-(0.30c)=0
We add all the numbers together, and all the variables
-0.25c-(+0.30c)+6.80=0
We add all the numbers together, and all the variables
-0.25c-(+0.30c)+6.8=0
We get rid of parentheses
-0.25c-0.30c+6.8=0
We add all the numbers together, and all the variables
-0.55c+6.8=0
We move all terms containing c to the left, all other terms to the right
-0.55c=-6.8
c=-6.8/-0.55
c=12+0.2/0.55
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