题目内容
求未知数.
1.8x-x=2.4
2.4x-0.45×2=0.3
x:
=
:
.
1.8x-x=2.4
2.4x-0.45×2=0.3
x:
1 |
2 |
3 |
5 |
9 |
5 |
(1)1.8x-x=2.4,
0.8x=2.4,
0.8x÷0.8=2.8÷0.8,
x=3,
(2)2.4x-0.45×2=0.3,
2.4x-0.9=0.3,
2.4x-0.9+0.9=0.3+0.9,
2.4x÷2.4=1.2÷2.4,
x=0.5,
(3)x:
=
:
,
x=
×
,
x×
=
×
,
x=
.
0.8x=2.4,
0.8x÷0.8=2.8÷0.8,
x=3,
(2)2.4x-0.45×2=0.3,
2.4x-0.9=0.3,
2.4x-0.9+0.9=0.3+0.9,
2.4x÷2.4=1.2÷2.4,
x=0.5,
(3)x:
1 |
2 |
3 |
5 |
9 |
5 |
9 |
5 |
1 |
2 |
3 |
5 |
9 |
5 |
5 |
9 |
3 |
10 |
5 |
9 |
x=
1 |
6 |
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