9=-4(f+1)+-7

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Solution for 9=-4(f+1)+-7 equation: 



9=-4(f+1)+-7

We move all terms to the left:

9-(-4(f+1)+-7)=0

We use the square of the difference formula

-(-4(f+1)-7)+9=0



We calculate terms in parentheses: -(-4(f+1)-7), so:

-4(f+1)-7

We multiply parentheses

-4f-4-7

We add all the numbers together, and all the variables

-4f-11

Back to the equation:

-(-4f-11)



We get rid of parentheses

4f+11+9=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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