Răspuns :
Răspuns:
[(900-a)+30]-100=230
(900-a)+30=330
900-a=300
a= 900-300
a=600
(((900-×)+30)-100)=230
(900-×)+30=230+100=330
900-×=330-30=300
×=900-300=600
Răspuns:
[(900-a)+30]-100=230
(900-a)+30=330
900-a=300
a= 900-300
a=600
(((900-×)+30)-100)=230
(900-×)+30=230+100=330
900-×=330-30=300
×=900-300=600