题目内容
解方程
x-20%x=16
+
x=
.
x-20%x=16
| 1 |
| 5 |
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| 3 |
| 5 |
(1)x-20%x=16,
x-0.2x=16,
(1-0.2)x=16,
0.8x=16,
0.8x÷0.8=16÷0.8,
x=20;
(2)
+
x=
,
+
x-
=
-
,
x=
,
x÷
=
÷
,
x=
×
,
x=
.
x-0.2x=16,
(1-0.2)x=16,
0.8x=16,
0.8x÷0.8=16÷0.8,
x=20;
(2)
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x=
| 2 |
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x=
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| 15 |
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