Question

5x-2y=-4. 3x-y=-5 método suma y resta​

Answer 1

Respuesta:

$5x-2y=4*3x-y=-5\left \{ {{5x-2y=-5} \atop {4*3x-y=-5}} \right. \{ {{5x-2y=-5} \atop {12x-y=-5}} \right. \left \{ {{5x-2y=-5} \atop {-24x+2y=10}} \right. =-19x=5\\\\x=-\frac{5}{19}=5*(-\frac{5}{19}) =-5 y=\frac{35}{19} \\(x,y)=(-\frac{5}{19} ,\frac{35}{19} )=5(-\frac{5}{19} )-2*3*(-\frac{5}{19} )-\frac{35}{19}=-5\\-5=-54=-5\\\\(x,y)=(-\frac{5}{19} , \frac{35}{19} )$

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