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f(-5)=-3-68
We move all terms to the left:
f(-5)-(-3-68)=0
We add all the numbers together, and all the variables
f(-5)-(-71)=0
We add all the numbers together, and all the variables
f(-5)+71=0
We multiply parentheses
-5f+71=0
We move all terms containing f to the left, all other terms to the right
-5f=-71
f=-71/-5
f=14+1/5
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