1.-3x=43; 2.-6х=-23; 3.3x-5=13; 4.-2x-9=31; 5.-3x+13=31; 6.5x+22=3x-45; 7.2(x+3)=-3(x-4); 8.(2x-5)(3x+7)=0

1.
-3x=43;
x = -43:3
x = -14 1/3

2.
-6х=-23;
x = 23 : 6
x = 3 5/6

3.
3x-5=13;
3x = 13 + 5
3x = 18
x = 18:3
x = 6

4.
-2x-9=31;
-2x = 31 + 9
-2x = 40
x = -40 : 2
x = -20

5.
-3x+13=31;
-3x = 31 - 13
-3x = 18
x = -18:3
x = -6

6.
5x+22=3x-45;
5x - 3x = -45 - 22
2x = -67
x = -67 : 2
x = -33,5

7.
2(x+3)=-3(x-4);
2x + 6= -3x + 12
2x + 3x = 12 - 6
5x = 6
x = 6:5
x = 1,2

8.
(2x-5)(3x+7)=0
2x-5= 0  или  3х+7=0
2x = 5            3x = -7
x = 5:2           x = -7:3
x = 2,5 или   х = -2 1/3