[a+(14:7)×8]×9-[15:5×2+(147:3)]×5=103

Răspuns :

[a+(14:7)×8]×9-[15:5×2+(147:3)]×5=103
(a+2×8)×9-(3×2+49)×5=103
(a+16)×9-(6+49)×5=103
(a+16)×9-55×5=103
(a+16)×9-275=103
(a+16)×9=103+275
(a+16)×9=378
a+16=378:9
a+16=42
a=42-16
a=26