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-9/10x=72
We move all terms to the left:
-9/10x-(72)=0
Domain of the equation: 10x!=0We multiply all the terms by the denominator
x!=0/10
x!=0
x∈R
-72*10x-9=0
Wy multiply elements
-720x-9=0
We move all terms containing x to the left, all other terms to the right
-720x=9
x=9/-720
x=-1/80
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