Question

x = 0.8x + 72
...i got 360....but it said i was wrong...:(

Answer 1

Subtract .8x from both sides. You will get:
\[.2x=72\]

Answer 2

Divide both sides by .2 you will get
x=360

Answer 3

And it does check in the original equation

Answer 4

I know but it said i was wrong aha

Answer 5

Reread your directions for entering the answer. Maybe you entered it wrong.

Answer 6

Maybe, thanks though. (:

Answer 7

Does it have to be to the nearest tenth or something?

Answer 8

Perhaps it has to say x=360.00 or something weird like that.

Answer 9

no. the lesson is solving equations with variables on both sides.

Answer 10

Who says the answer is wrong?

Answer 11

It automatically grades it when i submit it

Answer 12

So there is something wrong with the way you submitted it. Could you post the entire problem including the directions?

Answer 13

Yeah, 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 14

Notice that the problem say that s represents the total number of eople who became members that month and the question the problem asks is "how many people were between 30 and 40." So we need to answer the question the problem asks.

Answer 15

x represents the total number of people. Sorry for the typo.

Answer 16

Ohhh

Answer 17

So find 80% of 360 and that should be it.

Answer 18

288

Answer 19

Oh, okay, thank you (:

Answer 20

Did that work?

Answer 21

80% of 360, 288, yessss it did (:

Answer 22

Always be sure to answer the question the problem asks.