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O firma are 120 de angajati.Determinati numarul barbatilor angajati in firma, stiind ca numarul femeilor reprezinta 20% din numarul barbatilor


Răspuns :

f+b=120
f=[tex] \frac{20b}{100} [/tex]
[tex] \frac{20b}{100} +b=120[/tex] -aducem la acelasi numitor peste tot.
[tex] \frac{20b}{100} + \frac{100b}{100} = \frac{12000}{100} [/tex]
20b+100b=12000
120b=12000
b=12000/120
b=100

f+b=120
f=[tex] \frac{20b}{100} [/tex]
20b+100b=12000
120b=12000
b=12000/120
b=100