Respuesta :

Shirleythurmond57

Answer:

 X =  2

Step-by-step explanation:

mlarsen5000

Answer:

2

Step-by-step explanation:

(x+1)/2=21/14

cross multiply

14(x+1)=21(2)

14x+14=42

14x=42-14

14x=28

x=2

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