Question

как решить это уравнение???

Answer 1

-4/5a+1+5/6a=1/2a-2/5
-24a+30+25a=15a-12
a+30=15a-12
a-15a=-12-30
-14a=-42
a=3

Answer 2

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