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ma gandesc la un numar.adaug la acesta 426,din suma scad 253 si obtin 215.la ce numar m-am gandit?

Răspuns :

215+253-426=42
verificare
42+426-253=215
a+426-253=215
a+426=215+253
a+426=468
a=468-426
a=42


V:42+426-253=215