Ответ:
(6;1)
Объяснение:
(6+1=7;
2*6-1=11
[tex](6, 1)[/tex]
[tex]\displaystyle \left \{ {{x+y=7} \atop {2x-y=11}} \right.[/tex]
Сложим строки системы
[tex]\displaystyle \left \{ {{x+y=7} \atop {2x+x+y-y=11+7}} \right.[/tex]
[tex]\displaystyle \left \{ {{x+y=7} \atop {3x=18}} \right.[/tex]
[tex]\displaystyle \left \{ {{x+y=7} \atop {x=6}} \right.[/tex]
[tex]\displaystyle \left \{ {{y+6=7} \atop {x=6}} \right.[/tex]
[tex]\displaystyle \left \{ {{y=1} \atop {x=6}} \right.[/tex]
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Verified answer
Ответ:
(6;1)
Объяснение:
(6+1=7;
2*6-1=11
Ответ:
[tex](6, 1)[/tex]
Объяснение:
[tex]\displaystyle \left \{ {{x+y=7} \atop {2x-y=11}} \right.[/tex]
Сложим строки системы
[tex]\displaystyle \left \{ {{x+y=7} \atop {2x+x+y-y=11+7}} \right.[/tex]
[tex]\displaystyle \left \{ {{x+y=7} \atop {3x=18}} \right.[/tex]
[tex]\displaystyle \left \{ {{x+y=7} \atop {x=6}} \right.[/tex]
[tex]\displaystyle \left \{ {{y+6=7} \atop {x=6}} \right.[/tex]
[tex]\displaystyle \left \{ {{y=1} \atop {x=6}} \right.[/tex]