1.
{3x + 17y = 0
{-2x -8y = 0
{6x + 34y = 0
{-6x - 24y = 0
10y = 0
y = 0
-2x = 0
x = 0
Ответ: (0; 0)
2.
{6x + 7y = -33
{-x - 7y = 23
5x = -10
x = -2
-7y = 23 - 2 = 21
y = -3
Ответ: (-2; -3)
3.
{42x + 76y = 806
{-18x + 91y = 50
{21x + 38y = 403
{-18x + 91y = 50
{126x + 228y = 2418
{-126x + 637y = 350
865y = 2768
y = 3,2
-1,8x = 5 - 29,12 = -24,12
x = 13,4
Ответ: (13,4; 3,2)