9) 9|x|-6=0
9•|x|=6
|x|=2/3
x=-2/3
x1= -2/3, x2= 2/3
10) 8/x=6/5
8/x=6/5, x≠0
40=6x
6x=40
x= 20/3, x≠0
x= 20/3= 6⅔= 6,6
19) 2m/3 - 4m/5 = 3
10m - 12m = 45
-2m = 45
m= 45/2 = -22½ = -22,5
20) 4a/9 - 1 = 5a/12
16a - 36 = 15a
16a - 15a = 36
a = 36
21) 3(1-x)+5(x+2)=1-4x
3-3x+5x+10=1-4x
13+2x=1-4x
2x+4x=1-13
6x= -12
x= -2
22) 3(2-x)-(5x+4)=0,4-16x
6-3x-5x-4=0,4-16x
2-8x=0,4-16x
-8x+16x=0,4-2
8x= -16
x= -0,2
23) 2 (3-5p)=4 (1-p)-1
6-10p=5-4p-1
6-10p=3-4p
-10p+4p=3-6
-6p= -3
p= 1/2
24) 0,5 (2y-1)-(0,5-0,2y)+1=0
y-0,5-0,5+0,2y+1=0
1,2y+0=0
1,2y=0
y=0
25) -4 (5-2m)+3 (m-4)=6 (2-m)-5m
-20+8m+3m-12=12-6m-5m
-32+11m=12-11m
11m+11m=12+32
22m=44
m=2
26) 0,3 (3x-1)+0,2=5 (0,1-0,2x)-0,1
0,9x-0,3+0,2=0,5-x-0,1
0,9x-0,1=0,4-x
0,9+x=0,4+0,1
1,9x=0,5
x= 5/19