[tex]x - nr.[/tex]
[tex]b) \frac{4}{3} \times x = 80[/tex]
[tex] \frac{4x}{3} = 80[/tex]
[tex]4x = 3 \times 80[/tex]
[tex]4x = 240[/tex]
[tex]x = \frac{240}{4} [/tex]
[tex]x = 60[/tex]
[tex]c) \frac{5}{6} \times x = 100[/tex]
[tex] \frac{5x}{6} = 100[/tex]
[tex]5x = 6 \times 100[/tex]
[tex]5x = 600[/tex]
[tex]x = \frac{600}{5} [/tex]
[tex]x = 120[/tex]