Solve for f 1/f=1/d

Math
1f=1d
Set up the rational expression with the same denominator over the entire equation.
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Multiply each term by a factor of 1 that will equate all the denominators. In this case, all terms need a denominator of fd. The 1f expression needs to be multiplied by dd to make the denominator fd. The 1d expression needs to be multiplied by ff to make the denominator fd.
1f⋅dd=1d⋅ff
Multiply the expression by a factor of 1 to create the least common denominator (LCD) of fd.
1(d)
Multiply d by 1.
dfd=1d⋅ff
Multiply the expression by a factor of 1 to create the least common denominator (LCD) of fd.
1(f)
Multiply f by 1.
dfd=ffd
dfd=ffd
Since the expression on each side of the equation has the same denominator, the numerators must be equal.
d=f
Rewrite the equation as f=d.
f=d
Solve for f 1/f=1/d

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