Question

3 8/11 + 9 3/11 = 12 11/11 = 13
х+6 1/9 = 13
x=13- 6 1/9 это 1

Answer 1

х + 6 1/9 = 3 8/11 + 9 3/11
х + 6 1/9 = 13
х = 13 - 6 1/9
х = 6  8/9

Answer 2

х+61/9=13
х=13-61/3
×=13/1-61/9=117/9-61/9
×=6