Решите систему уравнений способом подстановки
a) [tex] \left \{ {{x=2+y} \atop { y^{2} -2xy=3}} \right. [/tex]
b) [tex] \left \{ {{x+y=7} \atop {x*y=12}} \right. [/tex]
a) [tex] \left \{ {{x=2+y} \atop { y^{2} -2xy=3}} \right. [/tex]
b) [tex] \left \{ {{x+y=7} \atop {x*y=12}} \right. [/tex]
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