问题
解答题
解方程. 3x+2x=35
x-
|
答案
(1)3x+2x=35,
5x=35,
5x÷5=35÷5,
x=7;
(2)
+x=4 7
,8 9
+x-4 7
=4 7
-8 9
,4 7
x=
;20 63
(3)x-
=2 5
,1 4
x-
+2 5
=2 5
+1 4
,2 5
x=
.13 20
解方程. 3x+2x=35
x-
|
(1)3x+2x=35,
5x=35,
5x÷5=35÷5,
x=7;
(2)
+x=4 7
,8 9
+x-4 7
=4 7
-8 9
,4 7
x=
;20 63
(3)x-
=2 5
,1 4
x-
+2 5
=2 5
+1 4
,2 5
x=
.13 20