Question

Rezolva ecuatia de gradul 1.
-3(x+2) pe x = 2( x+2) pe x + 5

Answer 1

-3x-6/x=2x+4/x+5x/x

-3x-6-2x-4-5x/x=0
-10x-10/x=0

facem tabelul semnelor  -10x-10=0 ; -10x=10;x=-1
x               -infinit       -1            0                    +infinit
-10x-10    +++++++++0-----------------------------------
x              ---------------------------0++++++++++++++
-10x-10/x   -------------0++++++/------------------------

=> x=-1