F(-4)=-3x+15

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Solution for F(-4)=-3x+15 equation: 



(-4)=-3F+15

We move all terms to the left:

(-4)-(-3F+15)=0

We add all the numbers together, and all the variables

-(-3F+15)-4=0

We get rid of parentheses

3F-15-4=0

We add all the numbers together, and all the variables

3F-19=0

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

3F=19

F=19/3

F=6+1/3

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