{2х - 5у = 21 {2x-5(3x+1)=21, {2x-15x-5=21, {-13x=26, {x=-2,{у = 3х + 1 {y=3x+1 {y=3x+1 {y=3x+1 {y=-5
{2х - 5у = 21 {2x-5(3x+1)=21, {2x-15x-5=21, {-13x=26, {x=-2,
{у = 3х + 1 {y=3x+1 {y=3x+1 {y=3x+1 {y=-5