tolong jawaban dan caranya ya

X-5 4
—— = ——- kali silang
15-5 10

10x-50 = 60-20
10x = 50+ 60 -20
10x = 90
X

Kesebangunan

nomor 15
EF = (AB x DE)+(CD x AE) : DE+AE
EF = (15 x 4)+(5 x 6) : 4+6
EF = 60+30 : 10
EF = 90 : 10
EF = 9 cm

nomor 16
PR/PS = PQ/PT
12+TR/9 = 9+11/12
12+TR/9 = 20/12
12+TR/9 = 5/3
3(12+TR) = 5 x 9
36 + 3TR = 45
3TR = 45-36
3TR = 9
TR = 9/3
TR = 3 cm

*semoga membantu. sukses selalu ^_^