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19+x/2=30
We move all terms to the left:
19+x/2-(30)=0
We add all the numbers together, and all the variables
x/2-11=0
We multiply all the terms by the denominator
x-11*2=0
We add all the numbers together, and all the variables
x-22=0
We move all terms containing x to the left, all other terms to the right
x=22
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