Question

x/4 - x/6 = 3
3x/ - x/3 = 5
x/5 - 1 =9
x/3-5=0
x/2 + 3x/5 =5
x/5 + x/2 = 7/10
ajuda ai galera pfv , sendo U=Q

Answer 1

a)
x - x  = 3
4   6

MMC = 4,6 = 12

4,6: 2
2,3: 2
1,3: 3
1,1   = 2.2.3 = 12

3x - 2x = 36
  12         12

x = 36
------------------------
b)   

3x   - x  =  5
 1      3

mmc = 3

9x - x = 5
    3       3

8x = 5
x = 5/8
--------------------------------------
c)

x - 1 = 9
5

mmc = 5

x - 5 = 45
   5       5

x = 5 + 45
x = 50
----------------------------
d)
x - 5 = 0
3

mmc = 3

x - 15 = 0
    3       3

x - 15 = 0
x = 15
*******************************
e)
x + 3x = 5
2     5

5x + 6x = 50
  10          10

11x = 50
x = 50/11
----------------------------------
f)
x +  x =  7 
5     2    10

mmc = 10

2x + 5x =  7
  10          10

7x = 7
x = 7/7
x = 1