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

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

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

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

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

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

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