问题
解答题
求未知数X.
|
答案
(1)
7 |
3 |
9 |
7 |
0.4X=
7 |
3 |
9 |
7 |
0.4X÷0.4=3÷0.4,
X=
30 |
4 |
(2)6X+0.5×7=6
1 |
2 |
6X+3.5=6
1 |
2 |
6X+3.5-3.5=6
1 |
2 |
6X=3,
6X÷6=3÷6,
X=
1 |
2 |
(3)
1 |
4 |
0.75X=
1 |
4 |
0.75X÷0.75=
3 |
4 |
X=1.
求未知数X.
|
(1)
7 |
3 |
9 |
7 |
0.4X=
7 |
3 |
9 |
7 |
0.4X÷0.4=3÷0.4,
X=
30 |
4 |
(2)6X+0.5×7=6
1 |
2 |
6X+3.5=6
1 |
2 |
6X+3.5-3.5=6
1 |
2 |
6X=3,
6X÷6=3÷6,
X=
1 |
2 |
(3)
1 |
4 |
0.75X=
1 |
4 |
0.75X÷0.75=
3 |
4 |
X=1.