Question

4 3/8÷5 1/4=х÷12
3 (2/5х+3)-3/5х=8

Answer 1

$4 frac{3}{8} : 5 frac{1}{4} =x:12 \ frac{35}{8} : frac{21}{4} =x:12 \ frac{35}{8} * frac{4}{21} =x:12 \ frac{5}{6} =x:12 \ x= frac{5}{6} *12 \ x=10$



$3( frac{2}{5} x+3)- frac{3}{5} x=8 \ frac{6}{5} x+9- frac{3}{5} x=8 \ frac{3}{5} x=8-9 \ frac{3}{5} x=-1 \ x=-1* frac{5}{3} \ x=- frac{5}{3} \ x=-1 frac{2}{3}$