tolong ........... kak............

8/x = 6/15
6x = 15×8
6x = 120
x = 120/6
x = 20

10/6+x = 6/15
10×15 = 6(6+x)
150 = 36+6x
150-36 = 6x
114 = 6x
114/6 = x
19 = x

AB = AE+BE
AB = 6+19
AB = 25

Jadi, jawabannya B

jawab
AED sebagun  ACB

AE= 6, ED = 8  →  dengan pitagoras AD = 10

AC/AE = AB/AD
15/6 = AB/10
AB = 150/6 = 25

AC/BC = AE/DE
15/BC = 6/8
BC = 8 x 15 / 6
BC = 20