解方程x+15=74;x-34=94;x+(45+13)=23.-数学

题目简介

解方程x+15=74;x-34=94;x+(45+13)=23.-数学

题目详情

解方程
x+
1
5
=
7
4
x-
3
4
=
9
4
x+(
4
5
+
1
3
)=
2
3
题型:解答题难度:中档来源:不详

答案

(1)x+class="stub"1
5
=class="stub"7
4

x+class="stub"1
5
-class="stub"1
5
=class="stub"7
4
-class="stub"1
5

x=1class="stub"11
20


(2)x-class="stub"3
4
=class="stub"9
4

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

x=3;

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

x+class="stub"17
15
=class="stub"2
3

x+class="stub"17
15
-class="stub"17
15
=class="stub"2
3
-class="stub"17
15

x=-class="stub"7
15

更多内容推荐