Răspuns:
y = 9
Explicație pas cu pas:
(41 - 40 : 8 + 5* y): 9 = 9
(41-5 + 5*y): 9 = 9
(36 + 5y) = 9*9
36 + 5y = 81
5y = 81 - 36
5y = 45
(41-40:8+5×y)=9×9
(41-40:8+5×y)=81
(41-5+5×y)=81
(36+5×y)=81
5×y=81-36
5×y=45
y=45:5
y=9
(41-40:8+5×9):9=9
(41-5+5×9):9=9
(41-5+45):9=9
(36+45):9=9
81:9=9
