解方程.x-35x=6514(x+0.5)=223x+12=78.-数学

题目简介

解方程.x-35x=6514(x+0.5)=223x+12=78.-数学

题目详情

解方程.
x-
3
5
x=
6
5

1
4
(x+0.5)=2
2
3
x+
1
2
=
7
8
题型:解答题难度:中档来源:不详

答案

(1)x-class="stub"3
5
x=class="stub"6
5

class="stub"2
5
x÷class="stub"2
5
=class="stub"6
5
÷class="stub"2
5

x=3;

(2)class="stub"1
4
(x+0.5)=2,
class="stub"1
4
(x+0.5)÷class="stub"1
4
=2÷class="stub"1
4

x+0.5-0.5=8-0.5,
x=7.5;

(3)class="stub"2
3
x+class="stub"1
2
=class="stub"7
8

class="stub"2
3
x+class="stub"1
2
-class="stub"1
2
=class="stub"7
8
-class="stub"1
2

class="stub"2
3
x÷class="stub"2
3
=class="stub"3
8
÷class="stub"2
3

x=class="stub"9
16

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