21=x/0.75-x

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Solution for 21=x/0.75-x equation: 



21=x/0.75-x

We move all terms to the left:

21-(x/0.75-x)=0



Domain of the equation: 0.75-x)!=0

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

-x)!=-0.75

x!=-0.75/1

x!=-0.75

x∈R



We add all the numbers together, and all the variables

-(-1x+x/0.75)+21=0

We get rid of parentheses

1x-x/0.75+21=0

We multiply all the terms by the denominator


1x*0.75-x+21*0.75=0

We add all the numbers together, and all the variables

-1x+1x*0.75+15.75=0

Wy multiply elements

-1x+0.75x+15.75=0

We add all the numbers together, and all the variables

-0.25x+15.75=0

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

-0.25x=-15.75

x=-15.75/-0.25

x=+63

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