1. {x=17+6y {5(17+6y)+6y=13
2. {x=17+6y {85+30y+6y=13
3. {x=17+6y {36y=-72
4. {x=5 {y=-2
{x-6y=17 {6x=30 {х=5 {х=5 {х=5
{5x+6y=13, {х-6у=17, {5-6у=17, {-6y=12, {у=-2
1. {x=17+6y {5(17+6y)+6y=13
2. {x=17+6y {85+30y+6y=13
3. {x=17+6y {36y=-72
4. {x=5 {y=-2
{x-6y=17 {6x=30 {х=5 {х=5 {х=5
{5x+6y=13, {х-6у=17, {5-6у=17, {-6y=12, {у=-2