Question

25c+23c-715c=2 12

Answer 1

$frac{2}{5}c+ frac{2}{3}c- frac{7}{15}c= frac{5}{2}$
$frac{6}{15}c+ frac{10}{15}c- frac{7}{15}c= frac{5}{2}$
$frac{9}{15}c= frac{5}{2}$
$c= frac{5}{2} : frac{3}{5}= frac{5}{2} * frac{5}{3} = frac{25}{6}= 4frac{1}{25}$