реши уравнение: а)12,78x + 3,84x +2,22x + 1,16x-0,3x =197; б)5,25x + 7,56x + 4,98x - 1,25x + 0,02x = 1,656; в)0,75x + 3,8x + 0,25x + 1,2x + 9,84x = 15,84
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19.7х = 197
х = 197/19.7
х = 10
19.7х=197
х=197:19.7
х=10
б)5,25x + 7,56x + 4,98x - 1,25x + 0,02x = 1,656;
16.56х=1.656
х=1.656:16.56
х=0.1
в)0,75x + 3,8x + 0,25x + 1,2x + 9,84x = 15,84
15.84х=15.84
х=15.84:15.84
х=1