Question

Ayuda..

1) -5x+8x+x-15+12x=16

2) 9x-7x+2=-4x-1


3) -3(x+1)-4x-1


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

Answer 1

Resolver.

1)

- 5x + 8x + x - 15 + 12x = 16

    3x + x + 12x - 15 = 16
 
         4x + 12x - 15 = 16
 
           16x = 16 + 15
 
           16x = 31 
 
               x = 31/16

....................................................................

2)

9x - 7x + 2 = - 4x - 1

2x + 2 = - 4x - 1

2x + 4x = - 1 - 2
 
  6x = - 3
 
    x = - 3:3/6:3
 
    x = - 1/2

...........................................................................

3)

- 3(x + 1) - 4x - 1 = 0

- 3x - 3 - 4x - 1 = 0

- 3x - 4x - 3 - 1 = 0
 
   - 7x - 4 = 0
 
   - 7x = - 4
 
     7x = - 4 (-)
 
     7x = 4
 
       x = 4/7 

......................................................................

4)

2(x + 3) = - 3(x - 1)

2x + 6 = - 3x + 3

2x + 3x = 3 - 6
 
  5x = 3
 
    x = 3/5