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x + y =6. x+y = 6
x - y =0 - x+3=6
2y = 6. x = 3
y = 3
2.
2x+3y-8=0 (dikali 3)
3x+2y-17=0(dikali 2)
6x+9y-24=0
6x+4y-34=0 -
5y+10=0
5y=-10
y=-2
2x+3y=8
2x+3(-2)=8
2x+(-6)=8
2x=8+6
2x=14
x=7
3.
2x+⅓y =5 (dikali 3) --> 6x + y=15
½x-y =-2. (dikali 2) --> x -2y=-4(dikali 6)
6x+y=15
6x-12y=-24 -
13y = 39
y =3
6x + y =15
6x + 3= 15
6x = 12
x =2