题目内容
解方程.
20-1.2x=5.6
x:x=
:
.
20-1.2x=5.6
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5 |
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7 |
(1)20-1.2x=5.6,
20-1.2x+1.2x=5.6+1.2x,
5.6+1.2x=20,
5.6+1.2x-5.6=20-5.6,
12x=14.4,
12x÷12=14.4÷12,
x=1.2;
(2)
:x=
:
,
x=
×
,
x=
,
x×
=
×
,
x=
.
20-1.2x+1.2x=5.6+1.2x,
5.6+1.2x=20,
5.6+1.2x-5.6=20-5.6,
12x=14.4,
12x÷12=14.4÷12,
x=1.2;
(2)
1 |
2 |
3 |
5 |
6 |
7 |
3 |
5 |
1 |
2 |
6 |
7 |
3 |
5 |
3 |
7 |
3 |
5 |
5 |
3 |
3 |
7 |
5 |
3 |
x=
5 |
7 |
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