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Ecuaciones Sencillas
Contributed by: CARTOLIN
(Original author: Suarez)
Escribe en cada caso el valor de la incógnita
para que se cumpla la igualdad.  
9 + x = 13
x =       
1 + x = 73
x =        
x +2 = 16
x=        
35 + x = 72
x =        
x + 17 = 52
x =        
36 + x = 77
x =       
23 + x = 101
x =        
x - 13 = 3
x =        
x - 19 = 32
x =        
29 - x = 13
x =       
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