解方程:(1)0.1x-0.20.02-x+10.5=3;(2)12{x-13[x-14(x-23)]-32}=x+34.-数学

题目简介

解方程:(1)0.1x-0.20.02-x+10.5=3;(2)12{x-13[x-14(x-23)]-32}=x+34.-数学

题目详情

解方程:(1)
0.1x-0.2
0.02
-
x+1
0.5
=3

(2)
1
2
{x-
1
3
[x-
1
4
(x-
2
3
)]-
3
2
}=x+
3
4
题型:解答题难度:中档来源:不详

答案

(1)原方程可以变形为:5x-10-2(x+1)=3,
5x-10-2x-2=3,
3x=15,
x=5;
(2)原方程可以变形为class="stub"1
2
[x-class="stub"1
3
(x-class="stub"1
4
x+class="stub"1
6
)-class="stub"3
2
]=x+class="stub"3
4

class="stub"1
2
(x-class="stub"1
3
x+class="stub"1
12
x-class="stub"1
18
-class="stub"3
2
)=x+class="stub"3
4

class="stub"1
2
class="stub"3
4
x-class="stub"14
9
)=x+class="stub"3
4

class="stub"3
8
x-class="stub"7
9
=x+class="stub"3
4

-class="stub"5
8
x=class="stub"3
4
+class="stub"7
9

x=-class="stub"22
9

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