9.625 - 15/x+4 = 7 1/8

9 5/8 - 15/х + 4 = 7 1/8;

77/8 + 4 - 57/8 = 15/х;

(77 + 32 - 57) / 8 = 15/х;

52/8 = 15/х;

13/2 = 15/х;

х = 15 : 13/2;

х = 15 * 2/13;

х = 30/13;

9 5/8 - 15/30/13 + 4 = 7 1/8;

77/8 + 4 - 15 : 30/13 = 57/8;

9,625 + 4 - 15 * 13/30 = 7,125;

13,625 - 195/30 = 7,125;

13,625 - 6,5 = 7,125;

7,125 = 7,125