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Ответ:

Пошаговое объяснение:

3(х-5)=х+3

3x - 15 = x + 3

3x - x = 3 + 15

2x = 18

x = 18 : 2

x = 9

-2(х+3)=2х-1

-2x - 6 = 2x - 1

-2x - 2x = 6 - 1

-4x = 5

x = 5 : (-4)

x = -1,25

-(2х+1)=1-х

-2x - 1 = 1 - x

-2x + x = 1 + 1

-x = 2

x = -2

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P.s - 4

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