Question

2.69. Решите уравнение:
1) 6-(х – 3) – 2(x + 2) = 10;
2) 5(x-1) - 4 (х – 3) = -20;
3) 0,6(х – 0,6) + 0,8(х – 0, 4) = 1;
4) 0, 3 (0, 4х – 1, 2) +0,36x = 3, 4;​

Answer 1

1)6x - 18 - 2x - 4 = 10

4x = 32

x = 8

2)5x - 5 - 4x + 12 = -20

x = -27

3)0,6x - 0,36 + 0,8x - 0,32 = 1

1,4x = 1,68

x = 1,2

4)0,12x - 0,36 + 0,36x = 3,4

0,48x = 3,76

x =

$7 \times \frac{5}{6}$