问题
解答题
解方程.
|
答案
(1)X+
=3 5
,7 10
X+
-3 5
=3 5
-7 10
,3 5
X=
;1 10
(2)2X-
=1-1 5
,1 5
2X-
+1 5
=1-1 5
+1 5
,1 5
2X=1,
2X÷2=1÷2,
X=
;1 2
(3)5X-3X=15,
2X=15,
2X÷2=15÷2,
X=7.5.
解方程.
|
(1)X+
=3 5
,7 10
X+
-3 5
=3 5
-7 10
,3 5
X=
;1 10
(2)2X-
=1-1 5
,1 5
2X-
+1 5
=1-1 5
+1 5
,1 5
2X=1,
2X÷2=1÷2,
X=
;1 2
(3)5X-3X=15,
2X=15,
2X÷2=15÷2,
X=7.5.