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3.74+18.9c=4c-6.78-11.4c
We move all terms to the left:
3.74+18.9c-(4c-6.78-11.4c)=0
We add all the numbers together, and all the variables
18.9c-(-7.4c-6.78)+3.74=0
We get rid of parentheses
18.9c+7.4c+6.78+3.74=0
We add all the numbers together, and all the variables
26.3c+10.52=0
We move all terms containing c to the left, all other terms to the right
26.3c=-10.52
c=-10.52/26.3
c=-4.1746031746032/10.436507936508
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