Question

HELP! There is this question on my test:

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?

112

288

360

432

I keep getting 360! I submitted it and it was incorrect, what am I doing wrong??

Answer 1

I think it's 288. Multipy 360 by 80%.

Answer 2

The test changed it now it's:

One month, a music site observed that 60% of the people who downloaded songs from its site downloaded Q Sam's latest single. The equation below represents this information, where x represents the total number of people who downloaded songs from the site that month.

x = 0.6x + 384

How many people who downloaded songs from the site that month downloaded Q Sam's latest single?

576

240

144

960

Could you help me so I don't get it wrong again?

Answer 3

First solve x, then you are going to multiply x by 60%

Answer 4

x= 960?

Answer 5

the multiplied by 60% would be 576?

Answer 6

Yes, 576.

Answer 7

ah, thank you so much!

Answer 8

im not very good at chemistry if thats what this is, so i could be wrong but im pretty sure its 576.

Answer 9

no! it was correct, no worries.