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40=1/39x+30
We move all terms to the left:
40-(1/39x+30)=0
Domain of the equation: 39x+30)!=0We get rid of parentheses
x∈R
-1/39x-30+40=0
We multiply all the terms by the denominator
-30*39x+40*39x-1=0
Wy multiply elements
-1170x+1560x-1=0
We add all the numbers together, and all the variables
390x-1=0
We move all terms containing x to the left, all other terms to the right
390x=1
x=1/390
x=1/390
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