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?

A)112
B)288
C)360
D)432

Answer 1

x=0.8x+72
0.2x=72
x=360

Answer 2

Now, find 80% of 360

Answer 3

got it? @AndreaYoung1

Answer 4

No. I don't believe so. I am lost. I did that and can't get the right answer..