题目内容
解方程.
6+
x=10
x=
x-20%x=0.6.
6+
7 |
10 |
3 |
5 |
6 |
7 |
x-20%x=0.6.
(1)6+
x=10,
6+
x-6=10-6,
x=4,
x×
=4×
,
x=
;
(2)
x=
,
x×
=
×
,
x=
;
(3)x-20%x=0.6,
0.8x=0.6,
0.8x÷0.8=0.6÷0.8,
x=0.75.
7 |
10 |
6+
7 |
10 |
7 |
10 |
7 |
10 |
10 |
7 |
10 |
7 |
x=
40 |
7 |
(2)
3 |
5 |
6 |
7 |
3 |
5 |
5 |
3 |
6 |
7 |
5 |
3 |
x=
10 |
7 |
(3)x-20%x=0.6,
0.8x=0.6,
0.8x÷0.8=0.6÷0.8,
x=0.75.
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