f(-4.5)=7(-4.5)-9

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Solution for f(-4.5)=7(-4.5)-9 equation: 



f(-4.5)=7(-4.5)-9

We move all terms to the left:

f(-4.5)-(7(-4.5)-9)=0

We add all the numbers together, and all the variables

f(-4.5)+40.5=0

We multiply parentheses

-4.5f+40.5=0

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

-4.5f=-40.5

f=-40.5/-4.5

f=+9

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