The document contains 15 math word problems involving solving equations for the variable x. The problems cover a variety of equation types including single variable linear equations, multi-step equations, and equations with fractions. The document also provides the solutions to each of the 15 problems.

1. EJERCICIOS
I. Determina el valor de x en las siguientes ecuaciones:
1) 4x = 2x - 12
2) 8x - 24 = 5x
3) 7x + 12 = 4x - 17
4) 3x - 25 = x - 5
5) 5x + 13 = 10x + 12
6) 12x - 10 = -11 + 9x
7) 36 - 6x = 34 - 4x
8) 10x -25 = 6x - 25
9) 11x - 1 + 5x = 65 x - 36
10) 4x - 13 - 5x = -12x + 9 + 8x
11) -5 + 7x +16 + x = 11x - 3 - x
12) 6x - 12 + 4x - 1 = -x - 7x + 12 - 3x + 5
13) 2x - (x + 5) = 6 + (x + 1)
14) 8 - (3x + 3) = x - (2x + 1)
15) 4x - 2 = 7x - (x + 3) + (-x - 6)

2. RESPUESTAS EJERCICIOS PROPUESTOS
EJERCICIOS
I.
1. x = -6 11. x = 7
2. x = 8 12. x = 10/7
3. x = -29/3 13. x = 5
4. x = 10 14. x = 3
5. x = 1/5 15. x = 7
6. x = -1/3
7. x = 1
8. x = 0
9. x = 5/7
10. x = 22/3