Aflati y din egalitatile:
a)65-{2y+[(y:2+12):3+18]:3}:2=12;

b)112+{[(144-5y):4+12y]:2-27}:15=120;

c)150-320:{[34y-(120-4y)]:10+6}=140;

d)125-{250-[175:(720:y+15)+3]x5}:10=105;

e)80-{[(6y-28):2+24]:5+48}:19=75;

f)30-{[(150-7y):2+6x]:5+48}:13=25.