(1)120+
x=168 (2)
-3x=
(3)x+15%x=3.22 (4)x÷
=
(5)
x-
=
(6)x×
=
(7)
x+
x=
(8)5.6÷70%x=5%
(1)120+
x=168
x= 48
x=60 (2)
-3x=
3x=
x=
(3)x+15%x=3.22
115%x=3.22
x=2.8 (4)x÷
=
x=
(5)
x-
=
x=
x=
(6)x×
=
x=
÷
x=
(7)
x+
x=
x=
x=
(8)5.6÷70%x=5%
70%x=5.6÷5%
70%x=112
x=160