-9+7x=5x+11 => 7x-5x=11+9 => 2x=20 => x=10
6x-13=2x-1 => 6x-2x=-1+13 => 4x=12 => x=3
5x-9+2x=19 => 5x+2x=19+9 => 7x= 28 => x=4
2x+[tex] \frac{1}{2} [/tex]=-0,75+[tex] \frac{1}{3} x[/tex] =>
Rationalizam ecuatia in partea din stanga, prima ecuatie cu 2 iar in partea din dreapta, prima ecuatie cu 3, iar a doua cu 4
[tex] \frac{2*2x+1}{2} = -\frac{3}{4} + \frac{1}{3}x[/tex] =>
[tex] \frac{4x+1}{2} = -\frac{9+4x}{12}[/tex]
Rationalizam cu 6 in partea din stanga a semnului egal si obtinem
[tex] \frac{6(4x+1)}{12} = -\frac{9+4x}{12}[/tex]
Efectuam calculul din partea stanga a ecuatie si simplificam toata ecuatia cu 12 obtinand
[tex]24x+6=-9-4x[/tex] => [tex]24x+4x=-9-6 =\ \textgreater \ 28x=-15 =\ \textgreater \ x=- \frac{15}{28} [/tex]
2x-3(1,5x+2)=4,7 => 20x-45x-60=47 => -25x=107 =>
x=[tex]- \frac{107}{25} [/tex]
