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aflati un numar x ,stiind ca 18% din el este 90


Răspuns :

[tex] \frac{18}{100} \times x = 90[/tex]

[tex] \frac{18x}{100} = 90[/tex]

[tex]18x = 9000[/tex]

[tex]x = \frac{9000}{18} [/tex]

[tex]x = \frac{3000}{6} [/tex]

[tex]x = 500[/tex]
18%•x=90
18/100•x=90
18x=90•100
18x=9000
x= 9000:18
x= 500