Решите,пожалуйста.Подробно.

1. [tex] \left \{ {{x\ \textless \ 8} \atop {9-x\ \textgreater \ 0}} \right. [/tex]

2. [tex] \left \{ {{7y+ x^{2} =2} \atop {-x-y=2}} \right. [/tex]
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