ответ: 1 x = 5 , 2) x = -2 3) x = -6 4) 14/-8
Объяснение:
1)4x-5=-х+20;
4x+x = 20+5
5x = 25
x = 5
2) 3+5х=-2х-11;
5x +2x = -11 -3
7x = -14
x= -2
3) 5(х-2)-12х=32;
5x -10 -12x =32
5x-12x = 32+10
-7x = 42
x = -6
4)15-4(7+2х)=1
15-28-8x=1
-8x =1+28-15
-8x=14
x = 14/-8
