contestada

A social networking site recorded that 80% of the people who became members of the site one month were between 30 and 40 years old. The equation below represents this information, where x represents the total number of people who became members of the site that month: x = 0.8x + 72 How many people who became members of the site that month were between 30 and 40 years of age?

Relax

Respuesta :

musiclover10045

x = 0.8x + 72

 when x is alone you can say it is 1x

Subtract 0.8x from both sides:

0.2x = 72

x = 72/0.2 

x = 360


Otras preguntas