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- 29 + X + 29 = - 5
LOS "29" SE CANCELAN
X = - 5
- 29 + x + 29 = - 5
Agrupamos los términos semejantes.
- 29 + 29 + x = - 5
x = - 5
.........................................................
Segundo ejercicio.
34 + y = 34 - 27
34 + y = 7
y = 7 - 34
y = - 27