题目内容
求x:
|
(x+45)×3
|
0.5x+1
|
(1)
:
=8:x,
x=
×8,
x÷
=
÷
,
x=4;
(2)(x+45)×3
=256,
3
x+144=256,
3
x+144-144=256-144,
3
x÷3
=112÷3
,
x=35;
(3)0.5x+1
×6=7,
0.5x+
=7,
0.5x+
-
=7-
,
0.5x÷0.5=0.25÷0.5,
x=0.5.
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| 6 |
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| 3 |
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| 3 |
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| 3 |
x=4;
(2)(x+45)×3
| 1 |
| 5 |
3
| 1 |
| 5 |
3
| 1 |
| 5 |
3
| 1 |
| 5 |
| 1 |
| 5 |
| 1 |
| 5 |
x=35;
(3)0.5x+1
| 1 |
| 8 |
0.5x+
| 27 |
| 4 |
0.5x+
| 27 |
| 4 |
| 27 |
| 4 |
| 27 |
| 4 |
0.5x÷0.5=0.25÷0.5,
x=0.5.
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