Question

\(\frac{3}{x+5}=15\%\)

Answer 1

\(\frac{3}{x+5}=\frac{15}{100}\)

\(\Rightarrow3.100=15.\left(x+5\right)\)

\(\Rightarrow300=15x+75\)

\(\Rightarrow15x=300-75=225\)

\(\Rightarrow x=\frac{225}{15}=15\)

Answer 2

3/x + 5= 15/100=3/20

suy ra : x+5 = 20 

x=20-5 

Vậy : x=15

mk nha