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