Question

Determinati numarul natural n astfel incat urmatoarele fractii sa fie egale cu fractia 3/4:
a) n/16
b) n+1/8
c) 6/n-1
d) 30/2n
e) 3/7n-10

Answer 1

a. n=3*16/4=12

b. n=(3*8)/4-1=24/4-1=5

c. n=(6*4)/3+1=24/3+1=9

d. n=(30*4)/3/2=120/3/2=40/2=20

e. 7n-10=(3*4)/3=4
    7n=14
    n=2