题目内容
求未知数x
(1)
x-5=
(2)9:2.5=3.6:x.
(1)
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(2)9:2.5=3.6:x.
(1)
x-5=
x-5+5=
+5
x=
x÷
=
÷
x=10;
(2)9:2.5=3.6:x
9x=2.5×3.6
9x÷9=9÷9
x=1.
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| 5 |
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| 4 |
| 15 |
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| 15 |
| 2 |
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x=10;
(2)9:2.5=3.6:x
9x=2.5×3.6
9x÷9=9÷9
x=1.
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