Answer:
x = 5
AB = 26
BC = 39
Step-by-step explanation:
A___B___C
AC = AB + BC
65 = (5x+1) + ( 7x+4 )
65 = 12x + 5
12x = 65-5
12x = 60
x = 60/12
AB = 5x +1 = 5(5) +1 = 25 +1 = 26
BC = 7x+4=7(5) + 4 = 35 +4 = 39
I hope I helped you^_^
