Question

aflati necunoscuta din expresia: 82x[(20:ax9:6+10):4]=328

Answer 1

82x[(20:ax9:6+10):4]=328
(20:a×9:6+10):4=328:82
(20:a×9:6+10):4=4
20:a×9:6+10=4×4
20:a×9:6+10=16
20:a×9:6=16-10
20:a×9:6=6
20:a×9=6×6
20:a×9=36
20:a=36:9
20:a=4
a=20:4
a=5