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Автор - Cet2004

3х(х+1)-2х(5х+3)=7х(2-х)+34

Ответ

Автор - ninak8584

Ответ:

 {3x}^{2}  + 3x -  {10x}^{2}  - 6x = 14x -  {7x}^{2}  + 34 \   { - 7x}^{2} - 3x = 14x -  {7x}^{2}   + 34 \  { - 7x}^{2}  - 3x - 14x +  {7x}^{2}  - 34 = 0 \  - 17x = 34 \ x =  - 2

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