Question

5. Rezolvați următoarele ecuații, unde x € Q:
d) 0,4 : x = 1,(3);
e) 2,2 : x= 3,(6);
c)x: 2,5 = 0,2(6);
f) 3,5 : x = 0,3(8).​

Answer 1

Răspuns:

d)

4/10 • 1/x = 4/3

4/10x = 4/3

40x = 12 =>x=12/40=3/10=0,3

e)22/10 • 1/x = 11/3

22/10x = 11/3

110x = 66 =>x=66/110=6/10=0,6

c)x • 10/25 = 4/15

x = 4/15 • 25/10

x = 2/3 = 0,(6)

f)35/10 • 1/x = 7/18

35/10x = 7/18

70x = 630 =>x=630/70=9