1. 2x+3=4x+2
 ⇒ 4x-2x=3-2
2x=1
x=1/2
There is one solution.
2. 18p-10p=5+6/2
8p=5+3
8p=8
p=8:8
p=1
3. 6a/3=2a
2a-a= -2 -3
a= - 5
4. 5+r-2=9,
 5-2+r=9
3+r=9
r=9 - 3
  r=6
5. -0,9 m= 9
   m= - 10
6. -2 (x+1/4)=5-1=4
   x+1/4= -2
   x= -2 - 1/4
   x= -8/4 - 1/4= - 9/4
7. 6f+4f= 6 + 12
  10 f = 18
   f=18/10=1,8
8. 7n - 3n= 16
  4n=16
  n=16:4
  n=4
9. 1/3m-5/6m= - 15 - 3
   2/6 m-5/6=-18
   - 3/6m=-18 ⇒ 1/2m=18
    m=2*18=36
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