题目内容
(中0五中?靖江市)x+
x=
:
=
:x
0.8中x-中=4.
| 五 |
| 五 |
| 9 |
| 中0 |
| 3 |
| 4 |
| 7 |
| 中五 |
| 五 |
| 7 |
0.8中x-中=4.
解;(1)x+
x=
,
x=
,
x÷
=
÷
,
x=
;
(2)
:
=
:x,
x=
×
,
x÷
=
÷
,
x=
;
(3)0.82x-2=w,
0.82x-2+2=w+2,
0.82x=8,
0.82x÷0.82=8÷0.82,
x=
.
| 1 |
| 5 |
| u |
| 20 |
| w |
| 5 |
| u |
| 20, |
| w |
| 5 |
| w |
| 5 |
| u |
| 20 |
| w |
| 5 |
x=
| 3 |
| 8 |
(2)
| 3 |
| 4 |
| 7 |
| 25 |
| 5 |
| 7 |
| 3 |
| 4 |
| 7 |
| 25 |
| 5 |
| 7 |
| 3 |
| 4 |
| 3 |
| 4 |
| 1 |
| 5 |
| 3 |
| 4 |
x=
| 4 |
| 15 |
(3)0.82x-2=w,
0.82x-2+2=w+2,
0.82x=8,
0.82x÷0.82=8÷0.82,
x=
| 400 |
| 41 |
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