425+{250/5+15/a*[53*5-(18*5-25)*4]*6}=625
425+{50+15/a*[265-(90-25)*4]*6}=625
425+{50+15/a*(265-260)*6]=625
425+[50+15/a*(5*6)]=625
425+50+450/a=625
475+450/a=625
450/a=625-475
450/a=150
a=450/150
a=3
Sper ca se vede bine pt ca l-am trimis de pe telefon si mie imi arata ca sunt toate legate..