Bantu selesain kak yaa​

Penjelasan dengan langkah-langkah:

x > 0

x = y-1 = z-2

xyz = 21(x+y+z)

xz = ?

x = y-1 …. (i)

y-1 = z-2

z = y+1 …. (ii)

xyz = 21(x+y+z)

xz = 21(x+y+z)/y

xz = 21((y-1)+y+(y+1))/y

xz = 21(y-1+y+y+1)/y

xz = 21(3y)/y

xz = 21.3y/y

xz = 21.3

xz = 63

cmiiw