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3=1+x/2
We move all terms to the left:
3-(1+x/2)=0
We add all the numbers together, and all the variables
-(x/2+1)+3=0
We get rid of parentheses
-x/2-1+3=0
We multiply all the terms by the denominator
-x-1*2+3*2=0
We add all the numbers together, and all the variables
-1x+4=0
We move all terms containing x to the left, all other terms to the right
-x=-4
x=-4/-1
x=+4
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