解方程.x+1719=2319x-423=1557-x=314.-数学

题目简介

解方程.x+1719=2319x-423=1557-x=314.-数学

题目详情

解方程.
x+
17
19
=
23
19

x-4
2
3
=
1
5

5
7
-x=
3
14
题型:解答题难度:中档来源:不详

答案

(1)x+class="stub"17
19
=class="stub"23
19

x+class="stub"17
19
-class="stub"17
19
=class="stub"23
19
-class="stub"17
19

x=class="stub"6
19


(2)x-4class="stub"2
3
=class="stub"1
5

x-4class="stub"2
3
+4class="stub"2
3
=class="stub"1
5
+4class="stub"2
3

x=4class="stub"13
15


(3)class="stub"5
7
-x=class="stub"3
14

class="stub"5
7
-x+x=class="stub"3
14
+x,
class="stub"3
14
+x=class="stub"5
7

class="stub"3
14
+x-class="stub"3
14
=class="stub"5
7
-class="stub"3
14

x=class="stub"1
2

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