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Ajutatima

Suma a patru nr nat consecutive este 62 calculati nr


Răspuns :

a+b+c+d=62
a+a+1+a+2+a+3=62
⇔4a+6=62
⇔4a=62-6
⇔4a=56
⇔a=56:4
⇔a=14
⇔b=14+1
⇔b=15
⇔c=14+2
⇔c=16
⇔d=14+3
⇔d=17
proba:14+15+16+17=29+16+17=45+17=62