问题
解答题
X-
3X=4 X÷0.4=0.16. |
答案
(1)X-
=7 8
,7 8
X-
+7 8
=7 8
+7 8
,7 8
X=
;7 4
(2)
+X=2 5 3 2
+X-2 5
=2 5
-3 2
,2 5
X=
;11 10
(3)3X=4,
3X÷3=4÷3,
X=
;4 3
(4)X÷0.4=0.16,
X÷0.4×0.4=0.16×0.4,
X=0.064.