Ответ:
[tex]\left \{ {{7x-y=10} \atop {5x+y=2}} \right.[/tex]
12x=12
x=12 : 12
x= 1
[tex]\left \{ {{x=1} \atop {5*1+y=2}} \right.[/tex]
5*1+y=2
5+y=2
y= 2-5
y= -3
[tex]\left \{ {{x=1} \atop {y= -3}} \right.[/tex]
Ответ: ( 1 ; -3)
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Ответ:
[tex]\left \{ {{7x-y=10} \atop {5x+y=2}} \right.[/tex]
12x=12
x=12 : 12
x= 1
[tex]\left \{ {{x=1} \atop {5*1+y=2}} \right.[/tex]
5*1+y=2
5+y=2
y= 2-5
y= -3
[tex]\left \{ {{x=1} \atop {y= -3}} \right.[/tex]
Ответ: ( 1 ; -3)