Răspuns:
B) (1/8x+7)* 1/3-2(14-13)=1
x+56/8 *1/3-2*1=1
x+56/24-2=1
x+56-48=24
x+8=24
x=16
C) 5X+20-9:4+3=12
5X+11:4+3=12
5X+11/4+3=12
5X+11+12=48
5X+23=48
5X=48-23
5X=25
X=5
D) x:(504:12-32)=21
x:(42-32)=21
x:10=21
1/10x=21
x=210
*=ori
/=fractie