Răspuns :
a 1
........= .........
3a+4 5 ⇒inmultim in diagonala
5a=1( 3a+4)
5a=3a+4
5a-3a=4
2a=4
a=4/2
a=2
........= .........
3a+4 5 ⇒inmultim in diagonala
5a=1( 3a+4)
5a=3a+4
5a-3a=4
2a=4
a=4/2
a=2