Question

1/2x+1/5x-1/10x=2
-4x=2(1/2-x)
z/20 = - 5
5x+2=x
-x-3=x-4
8,3-2x=0,5
4/9x=1/3x
x= -2x
4x+1=0

Answer 1

1/2x+1/5x-1/10x=2
5/10x+2/10x-1/10x=2
6/10x=2
3/5x=2   /*5/3
x=2*5/3
x=10/3
x=3i1/3

z/20=-5   /*20
z=-100

5x+2=
5x-x=-2
4x=-2
x=-2/4
x=-1/2

-x-3=x-4
-x-x=-4+3
-2x=-1
x=1/2

8,3-2x=0,5
-2x=0,5-8,3
-2x=-7,8
x=3,9

4/9x=1/3x
4/9x-1/3x=0
4/9x-3/9x=0
1/9x=0   /*9
x=0

x=-2x
x+2x=0
3x=0   /:3
x=0

4x+1=0
4x=-1
x=-1/4