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TIZOVALENTINYON
Respondido

Determine (x + y) no sistema:
2x - y=-1
3x + y = -1

GBT PFVR​

Resposta :

JWIFNEWION

[tex]2x - y=-1\\3x + y = -1\\\\\\\\y=2x+1\\3x+2x+1=-1\\5x=-2\\x=-2/5\\y=2(-2/5)+1\\y=-4/5+1\\y=1/5[/tex]

Assim:

x=-2/5

y=1/5

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