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Rezolvati
15x-29=61
18x-2ori3ori4<138


Răspuns :

15x-29=61
15x=61+29
15x=90
x=90:15
x=6
18x-2*3*4<138
18x-24<138
18x<138+24
18x<162
x<162:18
x<9
x{0,1,2,3,4,5,6,6,8}