
求未知数x的值.1-34x=0.6 23x+0....
1个回答
展开全部
①1-
x=0.6
1+
x-
x=0.6+
x
1=0.6+
x
0.6-0.6+
x=1-0.6
x=
x×
=
×
x=
②
x+0.5x=42
x+
x=42
x=42
x×
=42×
x=36
③8.6:7=x:1.4
7x=8.6×1.4
7x÷7=8.6×1.4÷7
x=1.72
3 |
4 |
1+
3 |
4 |
3 |
4 |
3 |
4 |
1=0.6+
3 |
4 |
0.6-0.6+
3 |
4 |
3 |
4 |
2 |
5 |
3 |
4 |
4 |
3 |
2 |
5 |
4 |
3 |
x=
8 |
15 |
②
2 |
3 |
4 |
6 |
3 |
6 |
7 |
6 |
7 |
6 |
6 |
7 |
6 |
7 |
x=36
③8.6:7=x:1.4
7x=8.6×1.4
7x÷7=8.6×1.4÷7
x=1.72
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