The low temperature for 6 consecutive days in a city were 9, 3, 4, 16, 11 and 5. What would the low temperature have to be on the seventh day to have a mean low temperature of 6 for the week? The answer is -6. How do you get that answer?

Answer 1

You get that answer (X) by solving
mean = (9 + 3 + 4 + 16 + 11 + 5 + X)/7 = 6

(48 +X)/7 = 6

48 + X = 42

Answer 2

Wrong