Question

select the correct answer. a water tank can be filled using pipe a, pipe b, when both pipes are working, it takes only 8 h \boxed{\frac{8}{2x} + \frac{8}{x}} which expression also represents this situation \bigcirc \frac{4(x + 2)}{x} \bigcirc \frac{12}{x} \bigcirc \frac{x + 2}{2x} \bigcirc \frac{16}{3x}

Explanation:

Step1: Simplify first fraction

$\frac{8}{2x} = \frac{4}{x}$

Step2: Add the two fractions

$\frac{4}{x} + \frac{8}{x} = \frac{4+8}{x}$

Step3: Compute numerator sum

$\frac{12}{x}$

Answer:

$\frac{12}{x}$ (the second option)