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Sistem  3(x+2)-2(y-1)= -1 
            2(2-x)-4(y-x)=1

Răspuns :

3x+6-2y+2=-1
4-2x-4y+4x=1

3x+2y=-9 (*2)
2x-4y=-4
=======(+)
8x=-22
x=[tex]\frac{-11}{4}[/tex]
[tex]\frac{-11}{2}-4y=-4[/tex]
[tex]4y=4-\frac{11}{2}[/tex]
[tex]4y=\frac{-3}{2}[/tex]
[tex]y=\frac{-3}{16}[/tex]
3x+6-2y+2=-1
4-2x-4y+4x=1
Trecem termenii liberi in dreapta
3x-2y=-9⇒2y=3x+9 aceasta se inlocuieste im ecuatia a doua
2x-4y=-3

2x-6x-18=-3⇒x=-15/4
2y=3(-15/4)+9⇒y=-9/8

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