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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?

Mathematics
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was that equation given to you. it seems wrong.
Thats what the question said
where did 72 come from? The people between 30 and 40 would be .80 times the total.

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Other answers:

i have no idea..
i just need help
ok. Let's solve the equation for x. So we are solving for the total of people who joined.
okay, i am so confused haha
x = 0.8x + 72 x - .8x = .8x + 72 - .8x .2x = 72 Divide both sides by .2 x = 360 Now that we know the total we can multiply this by 80% of .8 to get ppl between 30-40
thank you so much!(;
yw

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