3x-5y=13
3x+ y= 1 / -
-5y-y=13-1
-6y=12
y=-2
3x=1-y,3x=1-(-2),3x=3, x=1
/x,y/=/1,-2/
3х - 5у = 13
3х + у = 1
у = -3х + 1
3х - 5(-3х + 1) = 13
3х + 15х - 5 = 13
18х = 18
х = 1
у = -3 + 1
у = -2
ответ: (1; -2)
3x-5y=13
3x+ y= 1 / -
-5y-y=13-1
-6y=12
y=-2
3x=1-y,3x=1-(-2),3x=3, x=1
/x,y/=/1,-2/
3х - 5у = 13
3х + у = 1
3х - 5у = 13
у = -3х + 1
3х - 5(-3х + 1) = 13
3х + 15х - 5 = 13
18х = 18
х = 1
у = -3 + 1
у = -2
ответ: (1; -2)