Question

12-у=3,85

х+(-13 7/8)=5,25

Answer 1

$12-y=3,85$
$y=12-3,85$
$y=8,15$

$x+(-13\frac{7}{8})=5,25$
$x-13,875=5,25$
$x=5,25+13,875$
$x=19,125$