问题
解答题
|
答案
①x+
=2 5 4 9
x+
-2 5
=2 5
-4 9 2 5
x=
;2 45
②x-
=2 3 1 4
x-
+2 3
=2 3
+1 4 2 3
x=
;11 12
|
①x+
=2 5 4 9
x+
-2 5
=2 5
-4 9 2 5
x=
;2 45
②x-
=2 3 1 4
x-
+2 3
=2 3
+1 4 2 3
x=
;11 12