Question

{[(17-13)*15-20*3]*777+9}:x=9

Answer 1

[(4*15-60)*777+9]:x=9
[(60-60)*777+9]:x=9
(0*777+9):x=9
(0+9):x=9
9:x=9
x=9:9
x=1

[[CORONITA???]]

Answer 2

[(4*15-60)*777+9]:x=9 [(60-60)*777+9]:x=9 (0*777+9):x=9 (0+9):x=9 9:x=9 x=9:9 x=1