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x*9/2=3x
We move all terms to the left:
x*9/2-(3x)=0
We add all the numbers together, and all the variables
-3x+x*9/2=0
We multiply all the terms by the denominator
-3x*2+x*9=0
Wy multiply elements
-6x+9x=0
We add all the numbers together, and all the variables
3x=0
x=0/3
x=0
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