determinati x din proportia

Răspuns:
[tex]x=\frac{16}{17}[/tex]
Explicație pas cu pas:
[tex]\frac{3}{x} = \frac{51}{20-16:4}, x \neq 0[/tex]
[tex]\frac{3}{x} = \frac{51}{20-4}[/tex]
[tex]\frac{3}{x} = \frac{51}{16}[/tex] [tex]( inmultim - extremii)[/tex]
[tex]48=51x[/tex]
[tex]51x=48[/tex]
[tex]x=\frac{48}{51}[/tex]
[tex]x=\frac{16}{17}, x \neq 0[/tex]