21=5*f-(160/9)

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Solution for 21=5*f-(160/9) equation: 



21=5f-(160/9)

We move all terms to the left:

21-(5f-(160/9))=0

We add all the numbers together, and all the variables

-(5f-(+160/9))+21=0

We multiply all the terms by the denominator


-(5f-(+160+21*9))=0



We calculate terms in parentheses: -(5f-(+160+21*9)), so:

5f-(+160+21*9)

We add all the numbers together, and all the variables

5f-349

Back to the equation:

-(5f-349)



We get rid of parentheses

-5f+349=0

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

-5f=-349

f=-349/-5

f=69+4/5

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