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4/c=7
We move all terms to the left:
4/c-(7)=0
Domain of the equation: c!=0We multiply all the terms by the denominator
c∈R
-7*c+4=0
We add all the numbers together, and all the variables
-7c+4=0
We move all terms containing c to the left, all other terms to the right
-7c=-4
c=-4/-7
c=4/7
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