Решить уравнения: 1) 5x + 3 = –3x + 19 2) –6x + 2 = –x + 22 3) 3x + 4(5 – 3x) = –7 4)...

Question

Решить уравнения: 1) 5x + 3 = –3x + 19 2) –6x + 2 = –x + 22 3) 3x + 4(5 – 3x) = –7 4) 4(3x + 5) – 14 = 2(x – 7)

Answer 1

Ответ:

Пошаговое объяснение:

1)

5x + 3 = –3x + 19

5x + 3x = 19 - 3

8x = 16

x = 16 : 8

x = 2

2)

–6x + 2 = –x + 22

-x + 6x = 2 - 22

5x = -20

x = -20 : 5

x = -4

3)

3x + 4(5 – 3x) = –7

3x + 20 - 12x = -7

-9x + 20 = -7

9x = 20 + 7

9x = 27

x = 27 : 9

x = 3

4)

4(3x + 5) – 14 = 2(x – 7)

12x + 20 - 14 = 2x - 14

12x + 6 = 2x - 14

12x - 2x = -14 - 6

10x = -20

x = -20 : 10

x = -2