3x-11,4=0
3x=11,4
x=11,4/3
х=3,8
4x+5,5=2x-2,5
2x+8 = 0
2x = -8
x = -4
2x-(6x+1)=9
раскроем скобки
2x-6x-1 = 9
-4x-10 = 0
4x+10 = 0
4x = -10
x = -10/4
х=-2,5
3x-11,4=0
3x=11,4
x=11,4/3
х=3,8
4x+5,5=2x-2,5
2x+8 = 0
2x = -8
x = -4
2x-(6x+1)=9
раскроем скобки
2x-6x-1 = 9
-4x-10 = 0
4x+10 = 0
4x = -10
x = -10/4
х=-2,5