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3/5x=21
We move all terms to the left:
3/5x-(21)=0
Domain of the equation: 5x!=0We multiply all the terms by the denominator
x!=0/5
x!=0
x∈R
-21*5x+3=0
Wy multiply elements
-105x+3=0
We move all terms containing x to the left, all other terms to the right
-105x=-3
x=-3/-105
x=1/35
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