F(x)=4x+-15

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



(F)=4F+-15

We move all terms to the left:

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

We add all the numbers together, and all the variables

F-(4F-15)=0

We get rid of parentheses

F-4F+15=0

We add all the numbers together, and all the variables

-3F+15=0

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

-3F=-15

F=-15/-3

F=+5

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