CPM Homework Help : A2C Problem 8-112

Solve for x: $\frac { 1 } { a x } + \frac { 1 } { b } = \frac { 1 } { x }$ .

Step:

$\text{First multiply the equation by }\frac{abx}{abx}.$

b + ax = ab

Answer:

$x=\frac{ab-b}{a}$