11. Efectuati: b) а) 8/3а+12/3+3/3а-15/3а-25/3а; 9/2x+13/2x-18/2x+5/2x-10/2x; c) 45ху - 7/5xy +14/5ху - 9/5xy +25 ху; 5/6x³y-14/6х³y+19/6xy-23/6x³y+8/6x²у. d) 12. Reduceti termenii asemenan:
dau coroana!
