Jawabanmu

2014-04-10T17:15:35+07:00
X-3y=1
x-2y=2
----------  -
-1y = -1
y = 1

x-3.1=1
x-4=1
x=1+4
x=5

nilai 2x-5y
= 2.5-5.1
= 10-5
= 5

1 5 1
2014-04-10T17:15:54+07:00
Gk usah dicari X dan Y nya,tambahin aja
x-3y=1 P1
x-2y=2 P2
P1 +P2 

2x - 5y =3

jadi nilai 2x - 5y  adalah 3
1 5 1