0,4-6=0,6x-9 Решите уравнения 3x + 16 = 9 - 10x 0,6 (x + 1 2/3) = - 1,2 - 3,4 (x + 9 3/11) = - 68 x/3 + x/4 = - 21 2m/3 - 4m/5 = 3 4a/9 - 1 = 5a/12

Найдем корни уравнений.

1) 0,4 * x - 6 = 0,6 * x - 9;

0.4 * x - 0.6 * x = - 9 + 6;

-0.2 * x = - 3;

0.2 * x = 3;

x = 3/0.2;

x = 30/2;

x = 15.

2) 3 * x + 16 = 9 - 10 * x;

3 * x + 10 * x = 9 - 16;

13 * x = - 7;

x = - 7/1;

3) 0,6 * (x + 1 2/3) = - 1,2 - 3,4;

0.6 * (x + 1 2/3) = - 4.6;

x + 1 2/3 = - 4.6/0.6;

x + 1 2/3 = 46/6;

x + 1 2/3 = 23/3;

x + 1 2/3 = 7 2/3;

x = 7 2/3 - 1 2/3;

x = 7 - 1;

x = 6.

4) (x + 9 3/11) = - 68;

x = - 68 - 9 3/11;

x = - 77 3/11;

5) x/3 + x/4 = - 21;

4 * x + 3 * x = - 21 * 12;

7 * x = - 21 * 12;

x = - 3 * 12;

x = - 36;

5) 2 * m/3 - 4 * m/5 = 3;

2 * m * 5 - 4 * m * 3 = 3 * 15;

10 * m - 12 * m = 45;

2 * m = - 45;

m = - 45/2;

m = - 22.5;

6) 4 * a/9 - 1 = 5 * a/12;

4 * a * 4 - 1 * 36 = 5 * a * 3;

16 * a - 15 * a = 36;

a = 36.