1) 2 х=18-х 2) 7 х + 3 = 30-2 х 3) 7-2 х=3 х-18 4) 3 (х-2) = х+2 5) 5-2 (х-1) = Х+2

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23 июля, 16:54

1) 2 х=18-х 2) 7 х + 3 = 30-2 х 3) 7-2 х=3 х-18 4) 3 (х-2) = х+2 5) 5-2 (х-1) = Х+2

+5

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Хабар · Answer 1

1) 2x = 18 - x

2x + x = 18

3x = 18

x = 6

2) 7x + 3 = 30 - 2x

7x + 2x = 30 - 3

9x = 27

x = 3

3) 7 - 2x = 3x - 18

-2x - 3x = - 18 - 7

2x + 3x = 18 + 7

5x = 25

x = 5

4) 3 (x - 2) = x + 2

3x - 6 = x + 2

3x - x = 2 + 6

2x = 8

x = 4

5) 5 - 2 (x - 1) = x + 2

5 - 2x + 2 = x + 2

- 2x - x = 2 - 2 - 5

-3x = - 5

3x = 5

x = 5/3