f(-2)=5(-2)+3

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Solution for f(-2)=5(-2)+3 equation: 



f(-2)=5(-2)+3

We move all terms to the left:

f(-2)-(5(-2)+3)=0

We add all the numbers together, and all the variables

f(-2)+7=0

We multiply parentheses

-2f+7=0

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

-2f=-7

f=-7/-2

f=3+1/2

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