2x+17=22+3x 18+3x=x+14 25-4x=12-5x 13x+27=16x+4.5 21x+45=17+14x 13x+70=2x+15

1) 2x + 17 = 22 + 3x;

2x - 3x = 22 - 17;

-x = 5;

x = 5 : (-1);

x = - 5.

Ответ: х = - 5.

2) 18 + 3x = x + 14;

3x - x = 14 - 18;

2x = - 4;

x = - 4 : 2;

x = - 2.

Ответ: х = - 2.

3) 25 - 4x = 12 - 5x;

-4x + 5x = 12 - 25;

x = - 13.

Ответ: х = - 13.

4) 13x + 27 = 16x + 4,5;

27 - 4,5 = 16x - 13x;

22,5 = 3x;

x = 22,5 : 3;

x = 7,5.

Ответ: х = 7,5.

5) 21x + 45 = 17 + 14x;

21x - 14x = 17 - 45;

7x = - 28;

x = - 28 : 7;

x = - 4.

Ответ: х = - 4.

6) 13x + 70 = 2x + 15;

13x - 2x = 15 - 70;

11x = - 55;

x = - 55 : 11;

x = - 5.

Ответ: х = - 5.