Respuesta :

KurdishPotato

Answer:

62

Step-by-step explanation:

if C is the midpoint of AB then AC = CB

7x - 4 = 2x + 21 add like terms

5x = 25

x = 5 since AB = 9x + 17 we write 5 instead of x in the expression because that's the value we found for x

9×5 + 17 = 62
x = 5, AC = 31, AB = 62

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