Question

1) { x + 3y = 6
{ 2x + y = 7
2) { 2x + 4 = 11
{ 3x - y = 9​

Answer 1

.............................

Answer 2

Ответ:

1){ x+3y=6

{2x+y=7

x+3y=6,2x+y=7

x+3y=6

x=-3y+6

-3y+6x2x+y=7

2(-3y+6)+y=7

2-3y+6

-6y+12+y=7

-5y+12=7

-5y=-5

y=1

x=-3+6

x=3

x=3,y=1

2)x=7/2

y=3/2