Explicație pas cu pas:
(7×6:a×8)+9×6-27=83
(42: ax8) + 54 - 27= 83
(42:a×8) +27= 83
(42: ax8) = 83-27
42÷ ax8 = 5 6
42: a= 56:8
42:a= 7
a = 42:7
a= 6
Verificare
( 7x6:6×8)+54-27=83
(7×1×8)+ 27= 83
56+27= 83
83= 83
