Решите пж 1462 2) {9x-2y=-17 {x-2y=7 1463 2) {9x-7y=95 {4x+y=34

Question

Решите пж 1462 2) {9x-2y=-17 {x-2y=7 1463 2) {9x-7y=95 {4x+y=34

Answer 1

{9x-2y=-17

{x-2y=7

{9х-2у=-17

{х=7+2у

9(7+2у)-2у=-17

63+18у-2у=-17

16у=-17-63

16у=-80

у=-5

{у=-5

{х=7+2у

х=7+2•(-5)

х=7-10

х=-3

{у=-5

{х=-3