问题
解答题
|
答案
(1)x-
=5 6
,1 9
x-
+5 6
=5 6
+1 9
,5 6
x=
;17 18
(2)
+x=1 2
,5 6
+x-1 2
=1 2
-5 6
,1 2
x=
;1 3
(3)12x-9x=8.7,
3x=8.7,
3x÷3=8.7÷3,
x=2.9;
(4)2x+1=5,
2x+1-1=5-1,
2x÷2=4÷2,
x=2;
(5)3x-x=0.9,
2x=0.9,
2x÷2=0.9÷2,
x=0.45;
(6)x-
=3 4
,1 12
x-
+3 4
=3 4
+1 12
,3 4
x=
.5 6