x+
x=15
x÷
=
.
5x-3.5x=0.9
x=
8×5+2.5x=60 x=
一副羽毛球拍的价钱是38元.小敏买了一副羽毛球拍和2个羽毛球,一共用了40元,一个羽毛球?

①
=
②x+
=
③x+
=39
④x -
=
⑤x÷
=
⑥
×
=
①x:
=
:4
②
=
③
x+
×45=12
④7.5:x=2.5:12
⑤
:
=x:1.8
⑥20%:
=25%:x
×(5.1+x)=2.43
:x=4:
x+
x=12
x=0.6
×6-30%x=1.7