Jawabanmu

2014-03-02T22:29:49+07:00
x+y+xy= 7.................. persamaan 1
x+z+xz=7...................
persamaan 2
y+z+yz=3............
........persamaan 3

x + y + xy = x + z + xz
y + xy = x +xz
y (1+x) = z(1+x)
y = z

persamaan 3

y+z+yz= 3
z+z+z
² =3
2z + z
² = 3
z = 1

y=z=1
pesamaan 2
x+z+xz =7
x+1+1x =7
2x=6
x=3

jadi x=3
y =1
z= 1




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