Question

Rezolvați ecuațiile:
a. x•4/5=-1/3
b. x•2,4=-1/3
c. -5/6=-10/3•x
d. 0,001=0,1•x
e. x:3/5=-1/6
f. x:0,2=-0,5
g. -5/7:x=2/7

Answer 1

a. x•4/5=-1/3 
x=-1/3 : 4/5 =-1/3 × 5/4 =-5/12

b. x•2,4=-1/3
2,4=24/10=12/5
x=-1/3 :12/5=-1/3 × 5/12=-5/36

c. -5/6=-10/3•x
5/6=10/3•x
x=5/6 :10/3=5/6×3/10=1/4

d. 0,001=0,1•x 
1/1000=x/10
x=10/1000=0,01

e. x:3/5=-1/6
 x =-1/6 ×3/5=-1/10

f. x:0,2=-0,5
 x=-0,5 ×0,2=-0,1

g. -5/7:x=2/7
-5/7=x × 2/7
x=-5/7 :2/7=-5/7 × 7/2=-5/2