Răspuns :
x- Lungimea segmentului
[tex]x + \frac{x}{2} + \frac{x}{4} = 28 \\ \frac{4x + 2x + x}{4} = 28 \\ \frac{7x}{4} = 28 \\ x = 28 \div \frac{7}{4} \\ x = 28 \ \times \frac{4}{7} \\ x = 16[/tex]
[tex]x + \frac{x}{2} + \frac{x}{4} = 28 \\ \frac{4x + 2x + x}{4} = 28 \\ \frac{7x}{4} = 28 \\ x = 28 \div \frac{7}{4} \\ x = 28 \ \times \frac{4}{7} \\ x = 16[/tex]