Question

Dau COROANA!!Va rog!!Rezolvati in multimea Q ecuatia : a) 2 pe 3 x=46; c) 1 - 1 pe 5x=0,5; d) 1 pe 5 x - 1,3=1; g) 3,6:x=1,2;

Answer 1

a) 2/3x=46
    3/2×2/3x=3/2×46
    x=3×23
    x=69
c)1-1/5x=0.5
   1-0.2x=0.5
   -0.2x=0.5-1
   -0.2x=-0.5
   x=2.5
d) 1/5x-1.3=1
    0.2x=1.3=1
    0.2x=1+1.3
    0.2x=2.3
    x=11.5
g) 3.6÷x=1.2
    3.6/x=1.2
    36/10/x=1.2
    36/10x=1.2
    18/5x=1.2, x≠0
    18=6x
    6x=18
    x=3, x≠0.
    x=3.