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3+x/5=4
We move all terms to the left:
3+x/5-(4)=0
We add all the numbers together, and all the variables
x/5-1=0
We multiply all the terms by the denominator
x-1*5=0
We add all the numbers together, and all the variables
x-5=0
We move all terms containing x to the left, all other terms to the right
x=5
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