Tolong cuma 2 nomer .pliss...

    x-1
3. -----  - 2 = 2 
     2
  x-1 - 4 = 4
x-1 = 8
x= 7

B.

4. 1/3x+2/5x = 22
11/15 x= 22
x= 22 x 15 
    ------------
         11
x = 30
 D

3. x = 7
4. x =30

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