解方程.37x=2158x=2536720x=2150.-数学

题目简介

解方程.37x=2158x=2536720x=2150.-数学

题目详情

解方程.
3
7
x=21

5
8
x=
25
36

7
20
x=
21
50
题型:解答题难度:中档来源:不详

答案

(1)class="stub"3
7
x=21
class="stub"3
7
class="stub"7
3
=21×class="stub"7
3

x=49;

(2)class="stub"5
8
x=class="stub"25
36

class="stub"5
8
class="stub"8
5
=class="stub"25
36
×class="stub"8
5

x=class="stub"10
9


(3)class="stub"7
20
x=class="stub"21
50

class="stub"7
20
class="stub"20
7
=class="stub"21
50
×class="stub"20
7

x=class="stub"6
5

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