3f-20=f-2(f-4)-8

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Solution for 3f-20=f-2(f-4)-8 equation: 



3f-20=f-2(f-4)-8

We move all terms to the left:

3f-20-(f-2(f-4)-8)=0



We calculate terms in parentheses: -(f-2(f-4)-8), so:

f-2(f-4)-8

We multiply parentheses

f-2f+8-8

We add all the numbers together, and all the variables

-f

Back to the equation:

-(-f)



We add all the numbers together, and all the variables

3f-(-1f)-20=0

We get rid of parentheses

3f+1f-20=0

We add all the numbers together, and all the variables

4f-20=0

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

4f=20

f=20/4

f=5

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