1) (8x+5,2)/2,4 = 11/2
2(8x+5,2) = 2,4*11
16x+10,4 = 26,4
16x = 26,4-10,4
16x = 16
x = 16/16
x = 1
2) 4/1,6 = (7x-2)/10,4
4*10,4 = 1,6(7x-2)
41,6 = 11,2x-3,2
-11,2x = -3,2-41,6
-11,2x = -44,8
x = -44,8/-11,2
x = 4
3) (x-0,2)/0,8 = 4,2/1,2
1,2(x-0,2) = 0,8*4,2
1,2x-0,24 = 3,36
1,2x = 3,36+0,24
1,2x = 3,6
x = 3,6/1,2
x = 3
4) (3x+0,8)/9,6 = 4,8/3,6
3,6(3x+0,8) = 9,6*4,8
10,8x+2,88 = 46,08
10,8x = 46,08-2,88
10,8x = 43,2
x = 43,2/10,8
x = 4
5) (5x+3)/9 = 27/13,5
13,5(5x+3) = 9*27
67,5x+40,5 = 243
67,5x = 243-40,5
67,5x = 202,5
x = 202,5/67,5
x = 3
6) 8/20 = 28/(9x+7)
8(9x+7) = 20*28
72x+56 = 560
72x = 560-56
72x = 504
x = 504/72
x = 7