Question

CALCULEAZA NUMARUL NECUNOSCUT :
(a x 5) : 2 = 40 : 4 ;
(b :3) x 6 = 52-4 ;
9 x(c:6) = 6x6 ;
42 : (dx3) = 21: 3 ;
60 - (ex9) = 30 :5 ;
72-40 =(f:3)x(40:5) .

Answer 1

-(ax5):2=40:4, ax5=nr, nr.:2=20 , nr=40 atunci ax5=40, a=40:5, a=8 -(b:3)x6=48, daca b:3=nr atunci nr=48:6, nr=8 si b:4=8, b= 32 -9x(c:6)=36, 9xnr=36, nr=36:9, nr=4 atunci c:6=4, c=24 -42:nr=7, nr=42:7, nr=6, dx3=6, d=2 -60-nr=6, nr=54, ex9=54, e=54:9, e=6. - 32=nrx8, nr=4, f:3=4, f=12