Ответ:

-2x=4

х=4÷(-2)

х=-2

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3x - 5 + 2x = -4 + 7x + 3

3x + 2x - 7x = -4 + 3 + 5

5x - 7x = -1 + 5

-2x = 4

x = 4 / (-2)

x = -2

ответ: -2