20=0.25x+0.75(20-0.25x/0.75)

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Solution for 20=0.25x+0.75(20-0.25x/0.75) equation: 



20=0.25x+0.75(20-0.25x/0.75)

We move all terms to the left:

20-(0.25x+0.75(20-0.25x/0.75))=0

We add all the numbers together, and all the variables

-(0.25x+0.75(-0.25x/0.75+20))+20=0

We multiply all the terms by the denominator


-(0.25x+0.75(-0.25x+20*0.75+20))=0



We calculate terms in parentheses: -(0.25x+0.75(-0.25x+20*0.75+20)), so:

0.25x+0.75(-0.25x+20*0.75+20)

We add all the numbers together, and all the variables

0.25x+0.75(-0.25x+35)

We multiply parentheses

0.25x+0x+26.25

We add all the numbers together, and all the variables

1.25x+26.25

Back to the equation:

-(1.25x+26.25)



We get rid of parentheses

-1.25x-26.25=0

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

-1.25x=26.25

x=26.25/-1.25

x=-21

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