-4f+28=-4f+9(2f+20)

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Solution for -4f+28=-4f+9(2f+20) equation: 



-4f+28=-4f+9(2f+20)

We move all terms to the left:

-4f+28-(-4f+9(2f+20))=0



We calculate terms in parentheses: -(-4f+9(2f+20)), so:

-4f+9(2f+20)

We multiply parentheses

-4f+18f+180

We add all the numbers together, and all the variables

14f+180

Back to the equation:

-(14f+180)



We get rid of parentheses

-4f-14f-180+28=0

We add all the numbers together, and all the variables

-18f-152=0

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

-18f=152

f=152/-18

f=-8+4/9

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