daca fractiile x+3pe5 si 19pe25 sunt echivalente, atunci x=

Răspuns :


[tex] \it \dfrac{x+3}{5} = \dfrac{19}{25} |_{\cdot5} \Rightarrow x+3 = \dfrac{19}{5} \Rightarrow x = \dfrac{19}{5} -3 \Rightarrow x = \dfrac{4}{5} [/tex]



(x + 3)/5 = 19/25


25(x + 3) = 5·19


25x + 75 = 95


25x = 20


x =20/25


x = 4/5