Question

9xa=207 a:7=56 549-25x5+(19x3+200-99)=
a= a=
a= a=

Answer 1

$9*a=207 \\ a=207:9 \\ a=23 \\ \\ a:7=56 \\ a=56*7 \\ a=392$

$549-25*5+(19*3+200-99)= \\ =549-25*5+(57+200-99)= \\ =549-25*5+(257-99)= \\ =549-25*5+158= \\ =549-125+158= \\ =424+158= \\ =582$