E = 100xa-b
ax42+720-720:9=1060
ax42+720-80=1060 /+80
ax42+720=1140 /-720
ax42 = 420 / :42
a =10
100-b:16+350:7=144
100-b:16+50=144 /-50
100-b:16 = 94
b:16 = 100-94
b:16 = 6
b = 16x6
b = 96
E = 100x10 - 96
E = 1000 -96
E = 904
Sper ca te-am ajutat ! Coroana te rog !