afla numarul a care verifica egalitatea EX 2

Afla Numarul A Care Verifica Egalitatea EX 2 class=

Răspuns :

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