9/10x-9=21

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Solution for 9/10x-9=21 equation: 



9/10x-9=21

We move all terms to the left:

9/10x-9-(21)=0



Domain of the equation: 10x!=0

x!=0/10

x!=0

x∈R



We add all the numbers together, and all the variables

9/10x-30=0

We multiply all the terms by the denominator


-30*10x+9=0

Wy multiply elements

-300x+9=0

We move all terms containing x to the left, all other terms to the right

-300x=-9

x=-9/-300

x=3/100

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