Respuesta :

BrainIess
[tex] \frac{x}{15} = \frac{4}{5} \\ Change\ both\ fractions\ to\ a \\ common\ denominator, \\ \\ \frac{x}{15} = \frac{4 \times 3}{5 \times 3} \\ \frac{x}{15} = \frac{12}{15} \\ x = 12 [/tex]