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(x-54)/(x-69)=2.1
We move all terms to the left:
(x-54)/(x-69)-(2.1)=0
Domain of the equation: (x-69)!=0We add all the numbers together, and all the variables
We move all terms containing x to the left, all other terms to the right
x!=69
x∈R
(x-54)/(x-69)-2.1=0
We multiply all the terms by the denominator
(x-54)-(2.1)*(x-69)=0
We get rid of parentheses
x-(2.1)*(x-69)-54=0
We move all terms containing x to the left, all other terms to the right
x-(2.1)*(x-69)=54
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