f(-7)=2(-7)-3

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Solution for f(-7)=2(-7)-3 equation: 



f(-7)=2(-7)-3

We move all terms to the left:

f(-7)-(2(-7)-3)=0

We add all the numbers together, and all the variables

f(-7)+17=0

We multiply parentheses

-7f+17=0

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

-7f=-17

f=-17/-7

f=2+3/7

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