F(-1)=3(x+x)-8

Solution for F(-1)=3(x+x)-8 equation:

(-1)=3(F+F)-8

We move all terms to the left:

(-1)-(3(F+F)-8)=0

We add all the numbers together, and all the variables

-(3(+2F)-8)+(-1)=0

We add all the numbers together, and all the variables

-(3(+2F)-8)-1=0


We calculate terms in parentheses: -(3(+2F)-8), so:

3(+2F)-8

We multiply parentheses

6F-8

Back to the equation:

-(6F-8)


We get rid of parentheses

-6F+8-1=0

We add all the numbers together, and all the variables

-6F+7=0

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

-6F=-7

F=-7/-6

F=1+1/6