Răspuns :
Salut!
d) 542+x-117=638
x-117=638-542
x-117=96
x=96+117
x=213
e) (43+x)+(537-214)=975
(43+x)+323=975
43+x=975-323
43+x=652
x=652-43
x=609
Succes!
Salut!
d) 542+x-117=638
x-117=638-542
x-117=96
x=96+117
x=213
e) (43+x)+(537-214)=975
(43+x)+323=975
43+x=975-323
43+x=652
x=652-43
x=609
Succes!