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4=-2/5c
We move all terms to the left:
4-(-2/5c)=0
Domain of the equation: 5c)!=0We get rid of parentheses
c!=0/1
c!=0
c∈R
2/5c+4=0
We multiply all the terms by the denominator
4*5c+2=0
Wy multiply elements
20c+2=0
We move all terms containing c to the left, all other terms to the right
20c=-2
c=-2/20
c=-1/10
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