👤

(245:5+5xX):9+89=100

Răspuns :

(245:5+5×x):9+89=100
(245:5+5×x):9=100-89
(245:5+5×x):9=11
49+5x=11×9
49+5x=99
5x=99-49
5x=50
x=50:5
x=10
.........