Răspuns :
(a+7)×6=54
(a+7)=54:6
(a+7)=9
a=9-7
a=2
9×(9-b)=81
(9-b)=81:9
(9-b)=9
b=9-9
b=0
(9-c)×6=48
(9-c)=48:6
(9-c)=8
c=9-8
c=1
27:9+d×3=30
3+d×3=30
d×3=30-3
d×3=27
d=27:3
d=9
Sper ca te-am ajutat!
(a+7)=54:6
(a+7)=9
a=9-7
a=2
9×(9-b)=81
(9-b)=81:9
(9-b)=9
b=9-9
b=0
(9-c)×6=48
(9-c)=48:6
(9-c)=8
c=9-8
c=1
27:9+d×3=30
3+d×3=30
d×3=30-3
d×3=27
d=27:3
d=9
Sper ca te-am ajutat!