Автор - KlishinaLuba2003

решите уравнения
4х-9х=4
2х+8+3х=15
0,3х+1,8х=18,9
1,7х+3-0,8х=7,5

Ответ

Автор - silverlumen
-5x=4, x=-4/5
5x=7, x=7/5 = 1 2/5
2.1x=18.9, x=9
0.9x=4.5 x=5

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