Ayuda tarea de aritmética
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diana--------juana---------luisa
40 40-9 40-9+7
40 31 38
sumamos 40+31+38=109
sus edades suman 109..
la ocho no me sale
la tercera aaaa..
interpretamos..
toño saul
x+12 x
x+12+x=78
2x=66
x=33
RPTA:
saul=33
toño=33+12= 45