Răspuns :
4x-y=5
Rezulta ca
Y=4x-5
Inlocuim in prima ecuatie data de tine
X+2(4x-5)=-2
X+8x-10=-2
9x=-2+10
9x=8
[tex]x = \frac{8}{9} [/tex]
[tex]y = \frac{8}{9} \times 4 - 5 \\ y = \frac{32}{9} - \frac{45}{9} \\ y = \frac{ - 13}{9} [/tex]
4x-y=5
Rezulta ca
Y=4x-5
Inlocuim in prima ecuatie data de tine
X+2(4x-5)=-2
X+8x-10=-2
9x=-2+10
9x=8
[tex]x = \frac{8}{9} [/tex]
[tex]y = \frac{8}{9} \times 4 - 5 \\ y = \frac{32}{9} - \frac{45}{9} \\ y = \frac{ - 13}{9} [/tex]