Question

2x -7 = x+2

    5         3

 

 

 

5x = 2x + x-2

 2                3

Answer 1

2x -7 = x+2
  5         3

3.2x-7=5.x+2
6x-21=5x+10
6x-5x=10+21
1x=31
x=31/1
x=31




5x = 2x + x-2 
2                3  m.m.c de 3

5x=6x+x-2
2        3


3.5x=2.6x+1x-2
15x=12x+2x-4
15x-12x-2x=-4
3x-2x=-4
1x=-4
x=-4/1
x=-4

Answer 2

2x -7 = x+2   
5         3   

3(2x-7) = 5(x+2)
6x - 21 = 5x + 10
6x-5x = 10+21
x = 31

5x = 2x + x-2   mmc = 6
2                3
15x - 6x = 2(x-2)
9x = 2x - 4
 9x - 2x = - 4
     7x =- 4
       x = - 4
               7