[tex]\displaystyle\bf\\\left \{ {{2x + y = 4} \atop {x + y = 5 \: \: | \times ( - 2) }} \right. \\ \displaystyle\bf\\ + \left \{ {{2x + y = 4} \atop { - 2x - 2y = - 10 }} \right. \\ \\ y - 2y = 4 - 10 \\ - y = - 6 \\ y = 6 \\ \\ x + 6 = 5 \\ x = 5 - 6 \\ x = - 1[/tex]
Ответ: ( - 1 ; 6 )
Ответ:
Объяснение:
на фотографії.....
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[tex]\displaystyle\bf\\\left \{ {{2x + y = 4} \atop {x + y = 5 \: \: | \times ( - 2) }} \right. \\ \displaystyle\bf\\ + \left \{ {{2x + y = 4} \atop { - 2x - 2y = - 10 }} \right. \\ \\ y - 2y = 4 - 10 \\ - y = - 6 \\ y = 6 \\ \\ x + 6 = 5 \\ x = 5 - 6 \\ x = - 1[/tex]
Ответ: ( - 1 ; 6 )
Ответ:
Объяснение:
на фотографії.....