求未知数X:X+16X=7 80×34-14X=16 58:X=34:6 1-14X=34.
(1)X+
X=7,
x=7,
x÷
=7÷
,
x=6;
(2)80×
-
X=16,
60-
x=16
60-
x+
x=16+
x,
16+
x-16=60-16,
x=44,
x÷
=44÷
,
x=176;
(3)
:x=
:6,
x×
=
×6,
x×
=
,
x×
÷
=
÷
,
x=5;
(4)1-
x=
1 |
6 |
7 |
6 |
7 |
6 |
7 |
6 |
7 |
6 |
x=6;
(2)80×
3 |
4 |
1 |
4 |
60-
1 |
4 |
60-
1 |
4 |
1 |
4 |
1 |
4 |
16+
1 |
4 |
1 |
4 |
1 |
4 |
1 |
4 |
1 |
4 |
x=176;
(3)
5 |
8 |
3 |
4 |
x×
3 |
4 |
5 |
8 |
x×
3 |
4 |
15 |
4 |
x×
3 |
4 |
3 |
4 |
15 |
4 |
3 |
4 |
x=5;
(4)1-
1 |
4 |
3 |
4 |
温馨提示:答案为网友推荐,仅供参考