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f(.5)=-3(.5)-1
We simplify the equation to the form, which is simple to understand
f(.5)=-3(.5)-1
We move all terms containing f to the left and all other terms to the right.
+1f=-3-1-0-0
We simplify left and right side of the equation.
+1f=-4
We divide both sides of the equation by 1 to get f.
f=-4
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