Question

1) a)-2(x-3)-3(x-2)mai mic sau egal 4(x-1)
b)modul 2-3x inchidem modulul - modul 2+radical 5 inchidem modulul=
c)modul 2-3x inchidem modulul = 7
DAU COROANA SI 20 DE PCT

Answer 1

Salut!
-2(x-3)-3(x-2)≤4(x-1)
-2x+6-3x+6≤4x-4
-5x-4x≤-4-12
-9x≤-16/*(-1)
9x≥16
x≥16/9


|2-3x|-|2+√5|=0
=> |2-3x|=|2+√5|
     |2-3x|=2+√5
I:2-3x=-2-√5
-3x=-4-√5
3x=4+√5
=> x=(4+√5)/3
II:2-3x=2+√5
  -3x=√5
=> x=-√5/3


|2-3x|=7
I:2-3x=-7
-3x=-9
=>x=3
II:2-3x=7
-3x=5
=>x=-5/3