1) x+2=-x+14 2) 2x-3=x+1 3) 45-2x=3x+5 4) 9x-32=2+5x 5) 4x-7=2x-3 6) 8x-3=x+11 7) 7x+14=35 8) 2x:9=4 9) одну вторую х: 7=8

Найдем корни уравнений.

1) x + 2 = - x + 14;

Приведем к виду a * x = b.

x + x = 14 - 2;

x * 2 = 12;

x = 12/2;

x = 6.

2) 2 * x - 3 = x + 1;

2 * x - x = 1 + 3;

1 * x = 4;

x = 4.

3) 45 - 2 * x = 3 * x + 5;

-2 * x - 3 * x = 5 - 45;

-5 * x = - 40;

5 * x = 40;

x = 40/5;

x = 8.

4) 9 * x - 32 = 2 + 5 * x;

9 * x - 5 * x = 2 + 32;

x * (9 - 5) = 34;

x * 5 = 34;

x = 34/5;

x = 6.8.

5) 4 * x - 7 = 2 * x - 3;

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

x * (4 - 2) = 4;

2 * x = 4;

x = 4/2;

x = 2.

6) 8 * x - 3 = x + 11;

8 * x - x = 11 + 3;

x * (8 - 1) = 14;

x * 7 = 14;

x = 14/7;

x = 2.

7) 7 * x + 14 = 35;

7 * x = 35 - 14;

7 * x = 21;

x = 21/7;

x = 3.

8) 2 * x/9 = 4;

x/9 = 2;

x = 9 * 2;

x = 18;

9) (1/2 * х) / 7 = 8;

½ * x = 7 * 8;

½ * x = 56;

x = 56 * 2;

x = 112.