Question

икс+187:11=21 ..........

Answer 1

X+187:11=21 X+17=21 X=21-17 X=4

Answer 2

$x+187:11=21 \ 11x+187=21*11 \ 11x+187=1331 \ 11x=1331-187 \ 11x=1144 \ x=1144:11 \ x-104$