题目内容
求未知数 x.
0.9(x一4)=19.8
x+
x=1
7:x=
.
0.9(x一4)=19.8
| 4 |
| 7 |
| 1 |
| 2 |
7:x=
| 5 |
| 12 |
(1)0.9(x-4)=19.8,
0.9(x-4)÷0.9=19.8÷0.9,
x-4+4=22+4,
x=26;
(2)
x+
x=1,
x=1,
x÷
=1÷
,
x=
;
(3)7:x=
,
5x=7×12,
5x÷5=84÷5,
x=16.8.
0.9(x-4)÷0.9=19.8÷0.9,
x-4+4=22+4,
x=26;
(2)
| 4 |
| 7 |
| 1 |
| 2 |
| 15 |
| 14 |
| 15 |
| 14 |
| 15 |
| 14 |
| 15 |
| 14 |
x=
| 14 |
| 15 |
(3)7:x=
| 5 |
| 12 |
5x=7×12,
5x÷5=84÷5,
x=16.8.
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