5(х+2у)-1=6у+2
2(х+6у)-1=7у
5x+10y-1=6y+2
2x+12y-1=7y
5x+10y-6y=2+1
2x+12y-7y=1
5x+4y=3
2x+5y=1
x+0,8y=0,6
x=0,6-0,8y
2(0,6-0,8y)+5y=1
1,2-1,6y+5y=1
-1,6y+5y=1-1,2
3,4y=-0,2
y=-0,2÷3,4
y=-1/17
x=0,6-0,8×-1/17
x=11/17
(x;y)=(11/17;-1/17)
5(х+2у)-1=6у+2
2(х+6у)-1=7у
5x+10y-1=6y+2
2x+12y-1=7y
5x+10y-6y=2+1
2x+12y-7y=1
5x+4y=3
2x+5y=1
x+0,8y=0,6
2x+5y=1
x=0,6-0,8y
2x+5y=1
2(0,6-0,8y)+5y=1
1,2-1,6y+5y=1
-1,6y+5y=1-1,2
3,4y=-0,2
y=-0,2÷3,4
y=-1/17
x=0,6-0,8×-1/17
x=11/17
(x;y)=(11/17;-1/17)