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f(-3)=-1/3-3+13
We move all terms to the left:
f(-3)-(-1/3-3+13)=0
We add all the numbers together, and all the variables
f(-3)-(-1/3+10)=0
We multiply parentheses
-3f-(-1/3+10)=0
We get rid of parentheses
-3f-10+1/3=0
We multiply all the terms by the denominator
-3f*3+1-10*3=0
We add all the numbers together, and all the variables
-3f*3-29=0
Wy multiply elements
-9f-29=0
We move all terms containing f to the left, all other terms to the right
-9f=29
f=29/-9
f=-3+2/9
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