Question

qual a resposta dessa equação (x-5)/10+(1-2x)/5=(3-x)/4

Answer 1

(x - 5)  +   (1 - 2x)   =  (3 - x)
---------      ----------     --------
  10               5              4

2.(x - 5) + 4.(1 - 2x)         5.(3 - x)
---------------------------   =  ------------
       20                                 20

2x - 10 + 4 - 8x = 15 - 5x
2x - 8x - 6 = 15 - 5x
- 6x - 6 = 15 - 5x
- 6 - 15 = - 5x + 6x
- 21 = x
x = - 21

********************************
mmc (10,5,4) = 20

10,5,4: 2
5,5,2: 2
5,5,1: 5
-----------------
1,1,1  = 2.2.5 = 4.5 = 20