Answer:
Step-by-step explanation:
The given formula is expressed as
1/a + 1/b = 1/c
We want to express variable b in terms of the variables a and c. We would make variable b the subject of the formula.
Step 1
Subtracting 1/a from the left hand side of the equation and the right hand side of the equation, it becomes
1/a - 1/a + 1/b = 1/c - 1/a
1/b = 1/c - 1/a
1/b = (a - c)/ac
Taking the reciprocal of the left hand side of the equation and the right hand side of the equation, it becomes
b = ac/(a - c)
