9=(2n+4-9n)(-2)-25

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Solution for 9=(2n+4-9n)(-2)-25 equation: 



9=(2n+4-9n)(-2)-25

We move all terms to the left:

9-((2n+4-9n)(-2)-25)=0

We add all the numbers together, and all the variables

-((-7n+4)(-2)-25)+9=0

We multiply parentheses ..

-((+14n-8)-25)+9=0



We calculate terms in parentheses: -((+14n-8)-25), so:

(+14n-8)-25

We add all the numbers together, and all the variables

(14n-8)-25

We get rid of parentheses

14n-8-25

We add all the numbers together, and all the variables

14n-33

Back to the equation:

-(14n-33)



We get rid of parentheses

-14n+33+9=0

We add all the numbers together, and all the variables

-14n+42=0

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

-14n=-42

n=-42/-14

n=+3

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