[tex]\displaystyle\bf\\\left \{ {{u - 2v = 5 \: \: | \times ( - 3) } \atop {5u - 6v = 37 }} \right. \\ \displaystyle\bf\\ + \left \{ {{ - 3u + 6v = - 15} \atop {5u - 6v = 37 }} \right. \\ \\ 5u - 3u = 37 - 15 \\ 2u = 22 \\ u = 22\div 2 \\ u = 11\\ \\ 11 - 2v = 5 \\ 2v = 11 - 5 \\ 2v = 6 \\ v =6 \div 2 \\ v = 3[/tex]

Ответ: u = 11 ; v = 3