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3/2x+9=21
We move all terms to the left:
3/2x+9-(21)=0
Domain of the equation: 2x!=0We add all the numbers together, and all the variables
x!=0/2
x!=0
x∈R
3/2x-12=0
We multiply all the terms by the denominator
-12*2x+3=0
Wy multiply elements
-24x+3=0
We move all terms containing x to the left, all other terms to the right
-24x=-3
x=-3/-24
x=1/8
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