解方程.x+512=6745-x=38x÷1.8=3.6.-数学

题目简介

解方程.x+512=6745-x=38x÷1.8=3.6.-数学

题目详情

解方程.
x+
5
12
=
6
7
4
5
-x=
3
8
x÷1.8=3.6.
题型:解答题难度:中档来源:不详

答案

(1)x+class="stub"5
12
=class="stub"6
7

x+class="stub"5
12
-class="stub"5
12
=class="stub"6
7
-class="stub"5
12

x=class="stub"37
84


(2)class="stub"4
5
-x=class="stub"3
8

class="stub"4
5
-x+x=class="stub"3
8
+x,
class="stub"3
8
+x=class="stub"4
5

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

x=class="stub"17
40


(3)x÷1.8=3.6,
x÷1.8×1.8=3.6×1.8,
x=6.48.

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