Question

как решить это уравнение???

Answer 1

$-frac{4}{5}a+1+frac{5}{6}a=frac{1}{2}a-frac{2}{5}$
$-frac{4}{5}a+frac{5}{6}a-frac{1}{2}a=-frac{2}{5}-1$
$-frac{24}{30}a+frac{25}{30}a-frac{15}{30}a=-frac{2}{5}-frac{5}{5}$
$-frac{14}{30}a=-frac{7}{5}$
$-frac{7}{15}a=-frac{7}{5}$
$a=-frac{7}{5}:(-frac{7}{15})$
$a=-frac{7}{5}*(-frac{15}{7})$
$a=frac{105}{35}=3$