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Află nr (a ) care verifică egalitatea [(3a+19):5-2]· 11+2=35

Răspuns :

[(3a+19):5-2]· 11+2=35
[(3a+19):5-2]· 11=35-2
[(3a+19):5-2]· 11=33
(3a+19):5-2=33:11
(3a+19):5-2=3
(3a+19):5=3+2
(3a+19):5=5
3a+19=5x5
3a+19=25
3a=25-19
3a=6
a=6:3
a=2