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18/y=19.8/9.9
We move all terms to the left:
18/y-(19.8/9.9)=0
Domain of the equation: y!=0We add all the numbers together, and all the variables
y∈R
18/y-2=0
We multiply all the terms by the denominator
-2*y+18=0
We add all the numbers together, and all the variables
-2y+18=0
We move all terms containing y to the left, all other terms to the right
-2y=-18
y=-18/-2
y=+9
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