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(415+x)/6=102.50
We move all terms to the left:
(415+x)/6-(102.50)=0
We add all the numbers together, and all the variables
(x+415)/6-(102.5)=0
We add all the numbers together, and all the variables
(x+415)/6-102.5=0
We multiply all the terms by the denominator
(x+415)-(102.5)*6=0
We add all the numbers together, and all the variables
(x+415)-615=0
We get rid of parentheses
x+415-615=0
We add all the numbers together, and all the variables
x-200=0
We move all terms containing x to the left, all other terms to the right
x=200
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