Question

3x + 2y=8
6x - 14y =6
решите систему уравнений

Answer 1

{3х+2у=8 |*(-2)
{6х-14у=6

{-6х-4у=-16
{6х-14у=6
___________
-18у=-10
у= 10/18=5/9

$6x - \frac{14}{1} \times \frac{5}{9} = 6 \\ 6x - \frac{70}{9} = 6 \\ 6x = 13 \frac{7}{9} \\ x = \frac{124}{9} \times \frac{1}{6} \\ x = \frac{62}{27} \\ x = 2 \frac{8}{27} \: \:$


Ответ: (2 8/27; 5/9)