Question

solutia sistemului de ecuatii {3x+2y=-2 {x-y=6 este: S=

Answer 1

Răspuns:

$S=(2,-4)$

Explicație pas cu pas:

$\left \{ {{3x+2y=-2} \atop {x-y=6 | *2} \right.$

$\left \{ {{3x+2y=-2} \atop {2x-2y=12}} \right.$

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$5x = 10 |:5\\x=2$

$2-y=6\\-y=4 => y=-4$