Решите уравнение 780

1) 2х-3х=22-17

Х=5

2)3х-х=14-18

2х=-4/:2

Х=-2

3)-4х+5х=12-25

Х=-13

4)13х-16х=4,5-27

-3х=-22,5/:(-3)

Х=?

Ответ:

Пошаговое объяснение:

2x + 17 = 22 + 3x

3x - 2x = 17 - 22

x = -5

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18 + 3x = x + 14

3x - x = 14 - 18

2x = -4

x = -4 : 2

x = -2

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25 - 4x = 12 - 5x

5x - 4x = 12 - 25

x = -13

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13x + 27 = 16x + 4,5

16x - 13x = 27 - 4,5

3x = 22,5

x = 22,5 : 3

x = 7,5

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21x + 45 = 17 + 14x

21x - 14x = 17 - 45

7x = -28

x = -28 : 7

x = -4

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13x + 70 = 2x + 15

13x - 2x = 15 - 70

11x = -55

x = -55 : 11

x = -5

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