Răspuns :
s=nr.necunoscut
(104x4+83x5)-sx3=8x100+36:9
(416+415)-sx3=800+4
831-sx3=804
sx3=831-804
sx3=27
s=27:3
s=9
(104x4+83x5)-sx3=8x100+36:9
(416+415)-sx3=800+4
831-sx3=804
sx3=831-804
sx3=27
s=27:3
s=9
(104 x 4+ 83 x 5) - s x 3 = 8 x 100 + 36 : 9
831 - s x 3 = 804
831 - s = 268
s= 831 - 268
s=563
831 - s x 3 = 804
831 - s = 268
s= 831 - 268
s=563