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60*3/x-78=12
We move all terms to the left:
60*3/x-78-(12)=0
Domain of the equation: x!=0We add all the numbers together, and all the variables
x∈R
60*3/x-90=0
We multiply all the terms by the denominator
-90*x+60*3=0
We add all the numbers together, and all the variables
-90x+180=0
We move all terms containing x to the left, all other terms to the right
-90x=-180
x=-180/-90
x=+2
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