2x+4y*2+6x+8y-11=0
8x+8y+8y=11
8x+16y=11
8+16=11xy
24=-11xy
9x*2-16y*2-36x-96y-284=0
18x-32y-36x-96y-284=0
-32x+64y=284
32xy=284
xy=284: 32
xy=9
3*2+6x+5y-12=0
6+6x+5y-12=0\
6x+5y=-6+12
6x+5y=6
xy=6-11
xy=-5
2x+4y*2+6x+8y-11=0
8x+8y+8y=11
8x+16y=11
8+16=11xy
24=-11xy
9x*2-16y*2-36x-96y-284=0
18x-32y-36x-96y-284=0
-32x+64y=284
32xy=284
xy=284: 32
xy=9
3*2+6x+5y-12=0
6+6x+5y-12=0\
6x+5y=-6+12
6x+5y=6
xy=6-11
xy=-5