Question

Помогите пожалуйста решить уравнения 1) 15 – 2x = 10 + x2) х - 3 = 2 - 4х3) 2х + 3 = 5х + 5 - 3х - 24) 2х + 3 = 7 – 0,5х5) 2x + 5 = 2(x + 6)6) 20(x – 2) = 15x7) 13(x + 6) = 7(2 – 5x)8) 5(2x – 3) = 2(3x + 1) –69) 5(х – 3) + 2 = 3 (х – 4) + 2х ‒ 1​

Answer 1

Ответ:

15-2×х=10+х=15

х-3=2-4×х=-2

Answer 2

1) 15 – 2x = 10 -2x = 10 - 15 -2x = -5 x = -5 / -2 x = 2.5

2) х - 3 = 2 - 4х x + 4x = 2 + 3 5x = 5 x = 5 / 5 x = 1

3) 2х + 3 = 5х + 5 - 3х - 2 2x - 5x + 3x = 5 - 2 0 = 3 Нет решения

4) 2х + 3 = 7 - 0.5х 2x + 0.5x = 7 - 3 2.5x = 4 x = 4 / 2.5 x = 1.6

5) 2x + 5 = 2(x + 6) 2x + 5 = 2x + 12 5 = 12 Нет решения

6) 20(x – 2) = 15x 20x - 40 = 15x 20x - 15x = 40 5x = 40 x = 40 / 5 x = 8

7) 13(x + 6) = 7(2 – 5x) 13x + 78 = 14 - 35x 13x + 35x = 14 - 78 48x = -64 x = -64 / 48 x = -1.33

8) 5(2x – 3) = 2(3x + 1) – 6 10x - 15 = 6x + 2 - 6 10x - 6x = 2 - 6 + 15 4x = 11 x = 11 / 4 x = 2.75

9) 5(x – 3) + 2 = 3(x – 4) + 2x – 1 5x - 15 + 2 = 3x - 12 + 2x - 1 5x - 3x - 2x = -12 + 2 + 15 - 1 0 = 2 Нет решения