Question

ПОМОГИТЕ 1,,,,,2,,,,,3

Answer 1

№1

а)$(frac{2}{3} + frac{4}{7} )*42= frac{26}{21} * frac{42}{1} =52$

б)$(2 frac{1}{4} -1 frac{1}{2} )*8=( frac{9}{4} - frac{3}{2} )*8= frac{3}{4} * frac{8}{1} =6$

№2

$4 frac{1}{6}*3 frac{2}{7} +2 frac{5}{7} *4 frac{1}{6} = frac{25}{6} * frac{23}{7} + frac{19}{7} * frac{25}{6} = frac{575}{42} + frac{475}{42} = frac{1050}{42} = 25$

№3

$2 frac{1}{3} x-1 frac{1}{2} x+ frac{1}{6} x= frac{7}{3} x- frac{3}{2} x+ frac{1}{6} x= frac{14}{6} x- frac{9}{6}x + frac{1}{6} x= frac{6}{6} x = 1*x= x$