Question

2x+1 - x-3 = x denominadores = 4,5,3 ( na sequência )

Answer 1

2x + 1    -    x - 3    =    x
----------      ---------      -----
     4               5             3

15.(2x + 1) - 12(x - 3)              20x
------------------------------      =  --------
         60                                    60

30x + 15 - 12x + 36 = 20x
30x - 12x + 15 + 36 = 20x
18x + 51 = 20x
51 = 20x - 18x
51 = 2x
2x = 51
x = 51/2

¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨
4,5,3: 2
2,5,3: 2
1,5,3: 3
1,5,1: 5
--------------
1,1,1  =  2.2.3.5 = 4.15 = 60