\(\frac{15}{57-x}=\frac{3}{8}\) <=> 3(57 - x) = 15*8 <=> 171 - 3x = 120 <=> 3x = 51 <=> x = 17
Vậy x = 17
\(\frac{15}{57-x}=\frac{3}{8}\Rightarrow5.8=57-x\Rightarrow x=57-40=17\)
Vậy x=17
\(\frac{15}{57-x}=\frac{3}{8}\) <=> 3(57 - x) = 15*8 <=> 171 - 3x = 120 <=> 3x = 51 <=> x = 17
Vậy x = 17
\(\frac{15}{57-x}=\frac{3}{8}\Rightarrow5.8=57-x\Rightarrow x=57-40=17\)
Vậy x=17