tolong jwab skrng?pake cara

6.
(y + 10)/18 = 10/12
(y + 10)/18 = 5/6
6(y + 10) = 5 x 18
6y + 60 = 90
6y = 90 - 60
6y = 30
y = 30 / 6
y = 5 cm

jawaban A

7.
DE/CE = AB/AC
DE/20 = 15/12
DE/20 = 5/4
DE = 5/4 x 20
DE = 25 cm

jawaban A