Question

Rezolvati in multimea R ecuatia :
c)4pe 5 x-2=2intreg si 1 pe 2x - 1 pe 5
d)2 intreg si 1pe 2x+ 1p e 6 =2 intreg si 1 pe 3 x +1
i)-2x=3(x-5)+6

Answer 1

c)(4/5x)-2=[(4x+1)/2x]-1/5
(4-10x)/5x=[5(4x+1)-2x]/10x
2(4-10x)/10x=(20x-2x+1)/10x        
8-20x=18x+1
-20x-18x=1-8
-38x=-7     inmultim -1
x=7/38
daca am inteles bine ex.

d)[(4x+1)/2x]+1/6=[(6x+1)/3x]+1
[6(4x+1)+2x]/12x=(6x+1+3x)/3x
(24x+6+2x)/12x=4(9x+1)/3x
(26x+6)/12x=(36x+4)/12x
26x+6=36x+4
26x-36x=4-6
-10x=-2   inmultim, -1
x=2/10
x=1/5

e)-2x=3(x-5)+6
-2x=3x-15+6
-2x-3x=-9
-5x=-9    inmultim-1
x=9/5