222
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22+2x = 37+6+x 2x-x = 37+6-22 x = 21
22237 + 37 = 7474 + 74 = 148148 + 74 = 222 = 37 x 6
Sum(X) = 37 Sum(X2) = 289 Var(X) = Sum(X2) - sum(X)2/n = 289 - 37*37/5 = 15.20
-42 + 37 - (6 x 9) + (7/4) = -57.25
|x-9| = 37-x Suppose x-9 < 0 then 9-x = 37-x which is inconsistent. So 9-x > 0. Then x-9 = 37-x Add x to both sides: 2x-9 = 37 Add 9 to both sides: 2x = 46 so that x = 23.