3x+1-2x+8y+5=0 x+8y+6=0 x=-8y-6 x=-8y-6 x=8-6 x=2
2x+8y+9-10y-15=0 2x-2y-6=0 -16y-12-2y-6=0 -18y-18=0 y=-1 y=-1
3х+1=2(х-4у)-5 2(х+4у)+9=10у+15
3х+1=2х-8у-5 2х+8у+9=10у+15
3x+1-2x+8y+5=0 2x+8y+9-10y-15=0
x+8y+6=0 2x-2y-6=0
x=-8y-6
2(-8y-6) - 2y -6=0
-16y-12 -2y -6=0
-18y -18=0
-18y=18
y=-1
x=2
ответ:(2:-1)
3x+1-2x+8y+5=0 x+8y+6=0 x=-8y-6 x=-8y-6 x=8-6 x=2
2x+8y+9-10y-15=0 2x-2y-6=0 -16y-12-2y-6=0 -18y-18=0 y=-1 y=-1
3х+1=2(х-4у)-5 2(х+4у)+9=10у+15
3х+1=2х-8у-5 2х+8у+9=10у+15
3x+1-2x+8y+5=0 2x+8y+9-10y-15=0
x+8y+6=0 2x-2y-6=0
x=-8y-6
2(-8y-6) - 2y -6=0
-16y-12 -2y -6=0
-18y -18=0
-18y=18
y=-1
x=2
ответ:(2:-1)