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1/f=1/2+1/4
We simplify the equation to the form, which is simple to understand
1/f=1/2+1/4
We move all terms containing f to the left and all other terms to the right.
+1f=0.5 + 0.25
We simplify left and right side of the equation.
+1f=0.75
We divide both sides of the equation by 1 to get f.
f=0.75
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