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x/5+4=-21
We move all terms to the left:
x/5+4-(-21)=0
We add all the numbers together, and all the variables
x/5+25=0
We multiply all the terms by the denominator
x+25*5=0
We add all the numbers together, and all the variables
x+125=0
We move all terms containing x to the left, all other terms to the right
x=-125
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