Sa imi spuneți si cum se rezolva va rog

Răspuns
12/25[(4/3-6/5)·15+3]-4/5=
12/25[(20/15-18/15)·15+3]-4/5=
12/15(2/15·15+3)-4/5=
12/15(2+3)-4/5=
12/15·5-4/5=
12/3-4/5=
4-4/5=
20/5-4/5=
16/5=3,2