求未知数X. X:
|
(1)x:
=6:5,2 7
5x=6×
,2 7
5x=
,12 7
5x÷5=
÷5,12 7
x=
,12 35
(2)
=10 x
,4.5 0.9
4.5x=10×0.9,
4.5x=9,
4.5x÷4.5=9÷4.5,
x=2.
求未知数X. X:
|
(1)x:
=6:5,2 7
5x=6×
,2 7
5x=
,12 7
5x÷5=
÷5,12 7
x=
,12 35
(2)
=10 x
,4.5 0.9
4.5x=10×0.9,
4.5x=9,
4.5x÷4.5=9÷4.5,
x=2.