Question

¿Cuántas libras de café “La Finca” que se vende a $5 la libra debe mezclarse con 80 libras de

Answer 1

Answer:

Thew answer is "40 pounds".

Step-by-step explanation:

The  value of x pound is $5

It's mixed with 80 pound

Formula:

$\text{Average price} = \frac{\text{Rate of both}}{\text{weight of both}}$

Average price = 3

$\to 3 = \frac{5\times x+ 2\times 80}{x+ 80}$

$\to 3 = \frac{5x+ 160}{x+80}\\\\\to 3(x+80) = 5x+ 160 \\\\\to 3x+240 = 5x+ 160 \\\\\to 240-160 = 5x-3x \\\\\to 80 = 2x \\\\\to 2x=80 \\\\\to x=\frac{80}{2} \\\\\to x= 40$