Question

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?

Answer 1

Sorry, I read it wrong, *facepalm*

Okay, can you solve x in x = 0.8x + 72?

Answer 2

Let's say 1x = 0.8x + 72
If you move the 0.8x to the left, it would be

x-0.8x = 0.2x

If 0.2x = 72

What would be x?
And if x is the total number of user in this question, you multiply it by 80% and you'll get the answer.

Answer 3

i got 360

Answer 4

;D

Now multiply it by 80%

Answer 5

288 : )