Question

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Answer 1

Resposta:

k+5

Explicação passo-a-passo:

x=(k+6)/2

y=(2k+10)/2

z=(3k+14)/2

(x+y+z)/3=

[(k+6)/2+(2k+10)/2+(3k+14)/2]/3=

[(6k+30)/2]/3=

[3k+15]/3=

k+5