Решите уравнение: 1) 2x=18-x: 2) 7x+3=30-2x: 3) 7-2x=3x-18: 4) 0,2+2,7=1,4-1,1x: 5) 5,4-1,5x=0,3x-3,6x: 6) 3/8x+15=1/6x+10:

Найдем корни.

1) 2 * x = 18 - x;

2 * x + x = 18;

3 * x = 18;

x = 18/3;

x = 6.

2) 7 * x + 3 = 30 - 2 * x;

7 * x + 2 * x = 30 - 3;

9 * x = 27;

x = 27/9;

x = 3.

3) 7 - 2 * x = 3 * x - 18;

-2 * x - 3 * x = - 18 - 7;

-5 * x = - 25;

5 * x = 25;

x = 25/5;

x = 5.

4) 0,2 + 2,7 = 1,4 - 1,1 * x;

2.9 = 1.4 - 1.1 * x;

1.1 * x = 1.4 - 2.9;

11 * x = - 15;

x = - 15/11.

5) 5,4 - 1,5 * x = 0,3 * x - 3,6 * x;

-1.5 * x + 5.4 = - 3.9 * x;

-1.5 * x + 3.9 * x = - 5.4;

2.4 * x = - 5.4;

x = - 54/24;

x = - 27/12;

x = - 9/4.

6) 3/8 * x + 15 = 1/6 * x + 10;

3/8 * x - 1/6 * x = 10 - 15;

-9/24 * x - 4/24 * x = 5;

-13/24 * x = 5;

-13 * x = 5 * 24;

-13 * x = 120;

x = - 120/13.