Question

Найдите неизвестный член пропорции 1) х: 2.0=2: 5; 2) х: 18=7: 9 3) х: 18=2: 3 4) 6: х=3: 7 5)5: 9=15: х 6)12: 7=60: х

Answer 1

$\frac{x}{2}= \frac{2}{5} --\ \textgreater \ x= \frac{2*2}{5}=0,8$

$2) \frac{x}{18}= \frac{7}{9} --\ \textgreater \ x= \frac{18*7}{9}= 2*7=14$

$3) \frac{x}{18} = \frac{2}{3} --\ \textgreater \ x= \frac{18*2}{3}=6*2=12$

$4) \frac{6}{x}= \frac{3}{7} --\ \textgreater \ x= \frac{6*7}{3}=2*7=14$

$5) \frac{5}{9}= \frac{15}{x} --\ \textgreater \ x= \frac{9*15}{5}=9*3=27$

$6) \frac{12}{7}= \frac{60}{x} --\ \textgreater \ x=\frac{7*60}{12}=7*5=35$