-15=4(f-17)+-19

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Solution for -15=4(f-17)+-19 equation: 



-15=4(f-17)+-19

We move all terms to the left:

-15-(4(f-17)+-19)=0

We use the square of the difference formula

-(4(f-17)-19)-15=0



We calculate terms in parentheses: -(4(f-17)-19), so:

4(f-17)-19

We multiply parentheses

4f-68-19

We add all the numbers together, and all the variables

4f-87

Back to the equation:

-(4f-87)



We get rid of parentheses

-4f+87-15=0

We add all the numbers together, and all the variables

-4f+72=0

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

-4f=-72

f=-72/-4

f=+18

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