Please help me on this question

Doug E Fresh asked Nov 10, 2023

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Doug E Fresh asked Nov 10, 2023

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22 votes

a)
(13+7)/2 =10
(7+10)/2 =8.5
(10+8.5)/2 =9.25

b)
(2+x)/2 =7.5 |*2
2+x = 15. |-2
X=13

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