Ecuaciones

Resuelve las siguientes ecuaciones:

1.   x + 4 = 28

2.  y - 6.5 = 31

3.   8z = 40 + 3z

4.   10x = - 5x + 60

5.   - 15y + 3 = - 36 - 18y

6.   2x + 4 + (3x - 4) = 3x + 12

7.   4(3x + 2) - 8 = 5(2x + 3) + 5

8.   15x - 40 - 5x - 20 = 0

9.   16 - ( - 2x - 4) - (5x - 3x + 2) = - 4x - ( - 8x + 2)

10.   - (7x - 2 + 12) + ( - 5x - 3x + 4) = - ( - x + 7) - (6x - 4 - 7)

11.   - 18 - [ 3(x + 2) + 4] = 21 - [ 6( - 2x - 2) + 1]

12.    5 – x/3 = x/2 + 6

13.   (x + 6) - (x - 3) = 2x + 3x – 16

14.   (x + 3)- (x - 3) = - 2(x + 6)

15.   x/2 =  3