Question

AJUTOR ! Niciodata nu am inteles cum se fac !
1) a) 2( x - 4 ) + 6( 2x - 1 ) = 3 ( x +2 ) +2 =
b) 3x - 4 ( x - 1 ) + 2 ( 3x + 2 ) = 7- ( 3 - x ) =
c) -5 ( x + 2 ) -3 ( 2 - 5x ) = 9x - 5 ( -x + 3 ) =
Ajutor :( !

Answer 1

a)2(x-4)+6(2x-1)=3(x+2)+2⇔2x-8+12x-16=3x+6+2⇔14x-24=3x+8⇔14x-3x=24+8⇔11x=32⇒x=32:11 
b)3x-4(x-1)+2(3x+2)=7-(3-x)⇔3x-4x+4+6x+4=7-(3-x)⇔dx+8=7-(3-x)⇔8-7=3-x)-5x⇔1-3=x-5x⇔2+x+5⇒x+2-5⇒x=(-3)
c)-5x+10-6-15x+9x+5x-15⇔-20x+4=14x-15⇔-20x-14x=-15-4⇔-34x=-19⇔34x=19⇒x=19:34
  Am incercat sa lucrez etapa cu etapa ca sa ma poti verifica mai usor in caz ca am gresit :D.La punctul b)am jonglat mult cu numerele si nu cred ca o sa intelegi ceva si unde apare impartire este defapt fractie.

Answer 2

a)  2(x-4)+6(2x-1)=3(x+2)+2=2x-8+12x-6=3x+6+2=2x+12x-8-6=3x+6+2=14x-14=3x+8=14x-3x=8+14=11x=22   x=22/11  x=2     b) 3x-4(x-1)+2(3x+2)=7-(3-x)=3x-4x-4+6x+2=7-(3-x)=3x-4x+6x-4+2=7-(3-x)=5x-2=7-(3-x)=5x+x=7-3+2=6x=6   x=6/6=1   c)  -5(x+2)-3(2-5x)=9x-5(-x+3)=-5x+10-6-15x=9x-5x-15=-5x-15x+10-6=4x-15=20x+4=4x-15=20x-4x=-15+4= 16x=-11   x=-11/16