9(.80)=(9-x)(.75)+x

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Solution for 9(.80)=(9-x)(.75)+x equation: 



9(.80)=(9-x)(.75)+x

We move all terms to the left:

9(.80)-((9-x)(.75)+x)=0

We add all the numbers together, and all the variables

-((-1x+9)(0.75)+x)+9(0.8)=0

We add all the numbers together, and all the variables

-((-1x+9)(0.75)+x)+7.2=0

We multiply parentheses ..

-((-0.75x+6.75)+x)+7.2=0



We calculate terms in parentheses: -((-0.75x+6.75)+x), so:

(-0.75x+6.75)+x

We add all the numbers together, and all the variables

x+(-0.75x+6.75)

We get rid of parentheses

x-0.75x+6.75

We add all the numbers together, and all the variables

0.25x+6.75

Back to the equation:

-(0.25x+6.75)



We get rid of parentheses

-0.25x-6.75+7.2=0

We add all the numbers together, and all the variables

-0.25x+0.45=0

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

-0.25x=-0.45

x=-0.45/-0.25

x=1+0.2/0.25

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