(1\3+Х):7=(3\4+Х):9 (3 19\22+Х):4 1\5=5

(1\\3 + Х) : 7 = (3\\4 + Х) : 9; (1\\3 + Х) * 9 = (3\\4 + Х) * 7; 1\\3 * 9 + Х * 9 = 3\\4 * 7+ Х * 7; (1 * 9)/3 + Х * 9 = (3 * 7)/4 + Х * 7;(1 * 3)/1 + Х * 9 = 21/4 + Х * 7; 3 + Х * 9 = 21/4 + Х * 7; Х * 9 - Х * 7 = 5 1/4 - 3; Х * (9 - 2) = 2 1/4; Х * 2 = 2 1/4; Х * 2 = 9/4; Х = 9/4 : 2; Х = 9/4 * 1/2; Х = (9 * 1)/(4 * 2); Х = 9/8; Х = 1 1/8. Ответ: 1 1/8; (3 19\\22 + Х) : 4 1\\5 = 5; (3 19\\22 + Х) : 21/5 = 5; 85/22 + Х = 5 * 21/5; 85/22 + Х = 21; Х = 21 - 85/22; Х = 21 - 3 19/22; Х = 20 22/22 - 3 19/22; Х = 17 3/22. Ответ: 17 3/22.