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ex 30 dau coroana urgent

Ex 30 Dau Coroana Urgent class=

Răspuns :

a/3+10/2*6-6*7=102
a/3+5*6-42=102
a/3+30-42=102
a/3+30=102+42=144
a/3=144-30=114
a=114*3=342