93.1k views
5 votes
¿Cuántas libras de café “La Finca” que se vende a $5 la libra debe mezclarse con 80 libras de

café común que se vende a $2 la libra, para hacer una mezcla que se venda a $3 la libra?

1 Answer

7 votes

Answer:

Thew answer is "40 pounds".

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 = (5* x+ 2* 80)/(x+ 80)


\to 3 = (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=(80)/(2) \\\\\to x= 40

User Scipione Sarlo
by
5.6k points