(2t-3 4/15)*1,3=13/25
2t-34/15*1.3=13/15 2t=13/15+34/15*1.3 2t=..............
(2t-34/15)*13/10=13/25 13t-221-75=13/25 195t-221=39 195t=39+221 195t=260 t=260/195 t=4/5