题目内容
已知:15.6÷[2
×(1.625+▽)-1
]-
÷
=3
,则▽等于多少?
| 2 |
| 3 |
| 1 |
| 10 |
| 4 |
| 15 |
| 2 |
| 3 |
| 3 |
| 5 |
考点:方程的解和解方程
专题:简易方程
分析:等式15.6÷[2
×(1.625+▽)-1
]-
÷
=3
,把▽看作未知数x,式子转化为:15.6÷[2
×(1.625+x)-1
]-
÷
=3
,求出方程的解即可.
| 2 |
| 3 |
| 1 |
| 10 |
| 4 |
| 15 |
| 2 |
| 3 |
| 3 |
| 5 |
| 2 |
| 3 |
| 1 |
| 10 |
| 4 |
| 15 |
| 2 |
| 3 |
| 3 |
| 5 |
解答:
解:15.6÷[2
×(1.625+x)-1
]-
÷
=3
15.6÷[
×
+
x-1
]-
=3
15.6÷[
+
x-1
]=3
15.6÷[
+
x]=3
+
x=15.6÷3
+
x=
+
x-
=
-
x÷
=
÷
x=
;
答:则▽等于
.
| 2 |
| 3 |
| 1 |
| 10 |
| 4 |
| 15 |
| 2 |
| 3 |
| 3 |
| 5 |
15.6÷[
| 8 |
| 3 |
| 13 |
| 8 |
| 8 |
| 3 |
| 1 |
| 10 |
| 2 |
| 5 |
| 3 |
| 5 |
15.6÷[
| 13 |
| 3 |
| 8 |
| 3 |
| 1 |
| 10 |
| 1 |
| 5 |
15.6÷[
| 97 |
| 30 |
| 8 |
| 3 |
| 1 |
| 5 |
| 97 |
| 30 |
| 8 |
| 3 |
| 1 |
| 5 |
| 97 |
| 30 |
| 8 |
| 3 |
| 39 |
| 8 |
| 97 |
| 30 |
| 8 |
| 3 |
| 97 |
| 30 |
| 39 |
| 8 |
| 97 |
| 30 |
| 8 |
| 3 |
| 8 |
| 3 |
| 197 |
| 120 |
| 8 |
| 3 |
x=
| 197 |
| 320 |
答:则▽等于
| 197 |
| 320 |
点评:本题运用等式的基本性质进行解答即可.
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