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6+21/2x=20
We move all terms to the left:
6+21/2x-(20)=0
Domain of the equation: 2x!=0We add all the numbers together, and all the variables
x!=0/2
x!=0
x∈R
21/2x-14=0
We multiply all the terms by the denominator
-14*2x+21=0
Wy multiply elements
-28x+21=0
We move all terms containing x to the left, all other terms to the right
-28x=-21
x=-21/-28
x=3/4
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