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have you tried trial and error?

yes it just confuses me a bit more

yes

then it says the median is 82...so what do you think should you do?

theoretically, it should look something like 70+82+82+x+100/5= 66.8

exactly

except... it says the mean is 86 so it should be (72 + 82 + 82 + x + 100)/5 = 86

ohh. So, then how do you find that x?

that should be \[\frac{70 + 82 + 82 + x + 100}5 = 86\]

to solve for x, you should multiply both sides by 5 first

so have 5*86, which comes to 430, and I believe we can subtract the original 334 by 430, right?

right

awesome. That missing number would come to be 96. Thank you!

right