
求未知数x.38:x=120:0.6  ...
1个回答
展开全部
(1)
:x=
:0.6
x=
×0.6
x÷
=
÷
x=
;
(2)6.74-5.4x=0.37+4.6x
6.74-5.4x+5.4x=0.37+4.6x+5.4x
6.74=0.37+10x
6.74-0.37=0.37+10x-037
6.37=10x
6.37÷10=10x÷10
x=0.637.
3 |
8 |
1 |
20 |
1 |
20 |
3 |
8 |
1 |
20 |
1 |
20 |
9 |
40 |
1 |
20 |
x=
9 |
2 |
(2)6.74-5.4x=0.37+4.6x
6.74-5.4x+5.4x=0.37+4.6x+5.4x
6.74=0.37+10x
6.74-0.37=0.37+10x-037
6.37=10x
6.37÷10=10x÷10
x=0.637.
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