Question

{3х+2у=0,3
{5х-у=-0,8

Answer 1

$3x + 2y = 0.3 \\ 5x - y = - 0.8 \\ \\ \\ \\ 3x + 2y = 0.3 \\ 10 x - 2y = - 1.6 \\ \\ \\ \\ 13x = - 1.3 \\ \\ x = - 0.1 \\ \\ \\ 5 \times ( - 0.1) - y = - 0.8 \\ \\ \\ - 0.5 - y = - 0.8 \\ \\ - y = - 0.8 + 0.5 \\ \\ - y = - 0.3 \\ \\ \\ y = 0.3 \\ \\ \\ \\ x = - 0.1 \\ \\ y = 0.3$

ОТВЕТ: (x; y) = ( -0,1; 0,3).