问题
解答题
解方程. x-
x+
|
答案
(1)x-
=3 8
,5 12
x-
+3 8
=3 8
+5 12
,3 8
x=
;19 24
(2)x+
=1 5
;5 6
x+
-1 5
=1 5
-5 6
;1 5
x=
;19 30
(3)
+x+1 4
=6 7
,5 4
+x+1 4
-6 7
=1 4
-5 4
,1 4
x+
=1,6 7
x+
-6 7
=1-6 7
,6 7
x=
.1 7