Question

Cunoscand ca a/b=3/7 calculati valoarea expresiei 5a-b/2a+3b

Answer 1

Răspuns:

$\frac{8}{28}$

Explicație pas cu pas:

$\frac{a}{b} = \frac{3}{7} => a = 3k, b = 7k.\\\frac{5a-b}{2a+3b} = \frac{5\cdot3k-7k}{2\cdot3k + 3\cdot 7k} = \frac{8k}{27k} = \frac{8}{28}$