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-4/5s=7
We move all terms to the left:
-4/5s-(7)=0
Domain of the equation: 5s!=0We multiply all the terms by the denominator
s!=0/5
s!=0
s∈R
-7*5s-4=0
Wy multiply elements
-35s-4=0
We move all terms containing s to the left, all other terms to the right
-35s=4
s=4/-35
s=-4/35
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