Explicación paso a paso:
2x-5y=-21
[tex]x = - \frac{6}{5} - \frac{3y}{5} = \frac{ - 6 - 3y}{5} [/tex]
SUSTITUIMOS
[tex]2( \frac{ - 6 - 3y}{5} ) - 5y = - 21[/tex]
[tex] - 12 - 6y - 25y = - 21 \times 5[/tex]
[tex] - 12 - 31y = - 105[/tex]
[tex] - 31y = - 105 + 12[/tex]
[tex] - 31y = - 93[/tex]
Y=3
5X+3(3)=-6
5X+9=-6
5X=-15
X=-3
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Explicación paso a paso:
2x-5y=-21
[tex]x = - \frac{6}{5} - \frac{3y}{5} = \frac{ - 6 - 3y}{5} [/tex]
SUSTITUIMOS
[tex]2( \frac{ - 6 - 3y}{5} ) - 5y = - 21[/tex]
[tex] - 12 - 6y - 25y = - 21 \times 5[/tex]
[tex] - 12 - 31y = - 105[/tex]
[tex] - 31y = - 105 + 12[/tex]
[tex] - 31y = - 93[/tex]
Y=3
5X+3(3)=-6
5X+9=-6
5X=-15
X=-3