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25+x/7=31
We move all terms to the left:
25+x/7-(31)=0
We add all the numbers together, and all the variables
x/7-6=0
We multiply all the terms by the denominator
x-6*7=0
We add all the numbers together, and all the variables
x-42=0
We move all terms containing x to the left, all other terms to the right
x=42
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