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vovavladimir2003

Ответ:

x+3 = -9x

3 = -10x

x = - 10/3 = -3 1/3 ( -3 - целое число )

2x +2 = -3

2x = -5

x = - 2,5

10x + 9 = 7x

-3x = 9

x = -3

7+8x = -2x -5

10x = -12

x = -1,2

x ( домножим на 9 ) + x/9 (домножим на 1 )= -10/3 ( домножим на 3 )

9x+x / 9 = -30/9

10x/9 = -30/9

90x = -270

x = -3

x ( домножим на 5 ) + x/5 ( на 1 ) = -12/5 ( на 1 )

6x /5 = -12/5

30x = -60

x = -2

Как-то так .

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