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Ma gandesc la,un numar adaug 36 adaug 46 si obtin 100 La ce nr mam gandit

Răspuns :

X=numarul => x+36+46=100 => x=100-36-46=18
x+36+46=100 
x+36=100-46 
x+36=54
x=54-36
x=18 (numarul)