15 1/8 -а=7 8/5+ 4 3/8

15 1/8 -а=7 8/5+ 4 3/8
$15 \frac{1}{8} - a = 7 \frac{8}{5} + 4 \frac{3}{8}$
$15 \frac{1}{8} -a = \frac{43}{5} + \frac{35}{8}$
$15 \frac{1}{8} -a = \frac{8*43}{8*5} + \frac{5*35}{5*8}$
$15 \frac{1}{8} - a = \frac{344}{40} + \frac{175}{40}$
$15 \frac{1}{8} - a = \frac{519}{40}$
$15 \frac{1}{8} + \frac{519}{40} = a$
$a = \frac{121}{8} + \frac{519}{40}$
a = $\frac{5*121}{5*8} + \frac{519}{40}$
$a = \frac{605}{40} + \frac{519}{40}$
$a= \frac{1124}{40} =28 \frac{1}{10}$