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determinati numarul natural n stiind ca n+1/12 egal 5/3

Răspuns :

 n+1/12 = 5/3n+1=5/3 * 12
n+1=5*4
n+1=20
n=20-1
n=19
n+1/12=5/3⇔5x12=3(n+1)
⇒60=3n+3
3n=60-3
3n=57
n=57:3
n=19