<b>20. </b>Приведите пример системы одновременных уравнений:<img src="/close/store/examRes/%7B3D2AA3DC-39F5-4DE2-A9AC-237BC870F413%7D/20_1.png" /><img src="/close/store/examRes/%7B3D2AA3DC-39F5-4DE2-A9AC-237BC870F413%7D/20_2.png" /><img src="/close/store/examRes/%7B3D2AA3DC-39F5-4DE2-A9AC-237BC870F413%7D/20_3.png" /><img src="/close/store/examRes/%7B3D2AA3DC-39F5-4DE2-A9AC-237BC870F413%7D/20_4.png" /> <img src="/img/68/4b8093db1a3eb463a2689703b1.png" />, <img src="/img/e8/13c4af058dae2efa1ba9e888b1.png" />, <img src="/img/06/8dae3dfcf7307bae1b774cb00a.png" />, <img src="/img/c5/3d86aab612162463fcb640049d.png" />