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ajutatima la ex 23 Va rogggggggggggggg

Ajutatima La Ex 23 Va Rogggggggggggggg class=

Răspuns :

194*3+200-a=493
582+200-a=493
782-a=493
a=782-493
a=289
 

(104*4+83*5)-a*3=8*100+36:9
(416+415)-3a=8004+4
831-3a=804
3a=831-804
3a=27
a=9



(138*5-21:7-300*2)-9*9-r*2=2
(690-3-600)-81-2r=2
87-81-2r=2
6-2r=2
2r=6-2
2r=4
r=4:2
r=2