1.{0,75x+⅛y+1=0 1,3x-0,65y=0​

{ 0,75 +1/8у+1=0

{ 1,3х-0,65у=0

{ 3/4+1/8у+1=0

{ 1,3х-0,65у=0

{ 3/4+1+1/8у=0

{ 1,3х-0,65у=0

{ 3/4+4/4+1/8у=0

{ 1,3х-0,65у=0

{ 7/4(×2)+1/8у=0

{ 1,3х-0,65у=0

{ 14/8+1/8у=0 | :8

{ 1,3х-0,65у=0

{ 14+у=0

{ 1,3х-0,65у=0

{ у=0-14

{ 1,3х-0,65у=0

{ у=-14

{ 1,3х-0,65у=0

1,3х-0,65×(-14)=0

1,3х+9,1=0

1,3х=0-9,1

1,3х= -9,1

Х= - 9,1: 1,3

Х= - 7

(х, у) = (-7, - 14)

Ответ: (х, у) = (-7, - 14)