1)(3-5,8x)-(2,2x+3)=16
3-5,8x-2,2x-3=16
-8x=16
x=-2
2)21=-20-8(2x-0,5)
21=-20-16x+4
16x=-20+4-21
16x=-37
x=-37/16
3)-10(3-4x)+51=7(5x+3)
-30+40x+51=35x+21
40x-35x=21+30-51
5x=0,
x=0
4)6x-5(3x+2)=5(x-1)-8
6x-15x-10=5x-5-8
-9x-10=5x-13
-9x-5x=-13+10
-14x=-3
x=3/14
5)-8(2x-0,5)=0
2x-0,5=0
2x=0,5
x=0,25
6)-8(2x-0,5)=-8 /:(-8)
2x-0,5=1
2x=1+0,5
2x=1,5
x=0,75