X=
x+5=8
x=
x=
=
( )
①x+ =
②x÷ =
③ x=
④ -x=
⑤ x=
⑥x÷ =
① +x=
②x- =
③12x=
④ x=
⑤x÷ =
② x=
③x- - =
⑤ x+x=
⑥ +x+ =