Ответ:

Пошаговое объяснение:

4x + 5 = 2x - 7

4x - 2x = -7 - 5

2x = -12

x = -12:2

x = -6

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5x - 7 = 13

5x = 13+7

5x = 20

x = 20:5

x = 4

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3(x + 2) = 2(x+2)

3x + 6 = 2x + 4

3x - 2x = 4 - 6

x = -2

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2x - 4 = 8 + 2x

2x - 2x = 8 + 4

0 = 12

0 ≠ 12

нет решений

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4x + 6 = 2(2x + 3)

4x + 6 = 4x + 6

4x - 4x = 6 - 6

0 = 0

x є (-∞ ; ∞)

уравнение имеет множество решений

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3x + 4 = 7x - 8

7x - 3x = 4 + 8

4x = 12

x = 12:4

x = 3

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2x - 3 = 10

2x = 10+3

2x = 13

x = 13:2

x = 6,5

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2(x + 1) = 3(x + 1)

2x + 2 = 3x + 3

3x - 2x = 2 - 3

x = -1

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3x - 5 = 3 + 3x

3x - 3x = 3 + 5

0 = 8

0 ≠ 8

нет решений

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3x + 6 = 3(x + 2)

3x + 6 = 3x + 6

3x - 3x = 6 - 6

0 = 0

x є (-∞ ; ∞)

уравнение имеет множество решений

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