-11=7+f

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Solution for -11=7+f equation: 



-11=7+f

We move all terms to the left:

-11-(7+f)=0

We add all the numbers together, and all the variables

-(f+7)-11=0

We get rid of parentheses

-f-7-11=0

We add all the numbers together, and all the variables

-1f-18=0

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

-f=18

f=18/-1

f=-18

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