问题
解答题
x-
x+
|
答案
(1)
+x=1,1 2
+x-1 2
=1-1 2
,1 2
x=
;1 2
(2)x-
=5 7
,1 2
x-
+5 7
=5 7
+1 2
,5 7
x=
;17 14
(3)x+
=2 3
,10 11
x+
-2 3
=2 3
-10 11
,2 3
x=
.8 33
x-
x+
|
(1)
+x=1,1 2
+x-1 2
=1-1 2
,1 2
x=
;1 2
(2)x-
=5 7
,1 2
x-
+5 7
=5 7
+1 2
,5 7
x=
;17 14
(3)x+
=2 3
,10 11
x+
-2 3
=2 3
-10 11
,2 3
x=
.8 33