tentukan nilai x dan y

Bab kesebangunan
dari gambar maka disimpulkan
ad/ab=ae/ec=ed/cb
ad/ab=ae/ec
6/10=x/(2+x)
3(2+x)=5.x
6+3x=5x
6=2x
x=3

ad/ab=ed/cb
6/10=y/10
6=y

x/x + 2 = 6/6 + 4
x/x + 2 = 6/10
10(x) = 6(x + 2)
10x = 6x + 12
10x - 6x = 12
4x = 12
x = 12/4
x = 3

y/10 = 6/6 + 4
y/10 = 6/10
10(y) = 10(6)
10y = 60
y = 60/10
y = 6

maaf kalo salah