问题
解答题
解方程.
|
答案
(1)
+x=3 8
;3 4
+x-3 8
=3 8
-3 4
,3 8
x=
;3 8
(2)x-
=1 6
,1 3
x-
+1 6
=1 6
+1 3
,1 6
x=
;1 2
(3)4x-x=7.8,
(4-1)x=7.8,
3x=7.8,
3x÷3=7.8÷3,
x=2.6.
解方程.
|
(1)
+x=3 8
;3 4
+x-3 8
=3 8
-3 4
,3 8
x=
;3 8
(2)x-
=1 6
,1 3
x-
+1 6
=1 6
+1 3
,1 6
x=
;1 2
(3)4x-x=7.8,
(4-1)x=7.8,
3x=7.8,
3x÷3=7.8÷3,
x=2.6.