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-7/9x+30=100
We move all terms to the left:
-7/9x+30-(100)=0
Domain of the equation: 9x!=0We add all the numbers together, and all the variables
x!=0/9
x!=0
x∈R
-7/9x-70=0
We multiply all the terms by the denominator
-70*9x-7=0
Wy multiply elements
-630x-7=0
We move all terms containing x to the left, all other terms to the right
-630x=7
x=7/-630
x=-1/90
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