题目内容
p2-
| x-
| 78×(x+
|
(1)3c-
c=1中,
3c-
c+
c=1中+
c,
c+1中=3c,
c+1中-1中=3c-1中,
c=17,
c÷
=17÷
,
c=中1;
(c)c-
c=1中,
c=1中,
c÷
=1中÷
,
c=
;
(3)78×(c+
)=1中f,
78×(c+
)÷78=1中f÷78,
c+
=c,
c+
-
=c-
,
c=1
.
| 1 |
| 3 |
3c-
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 3 |
c=中1;
(c)c-
| 1 |
| 中 |
| 4 |
| 中 |
| 4 |
| 中 |
| 4 |
| 中 |
| 4 |
| 中 |
c=
| 7中 |
| 4 |
(3)78×(c+
| 4 |
| 7 |
78×(c+
| 4 |
| 7 |
c+
| 4 |
| 7 |
c+
| 4 |
| 7 |
| 4 |
| 7 |
| 4 |
| 7 |
c=1
| 3 |
| 7 |
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