问题
解答题
|
答案
(1)3x-
=3 4
,1 4
3x-
+3 4
=3 4
+1 4
,3 4
3x÷3=1÷3,
x=
;1 3
(2)x-(
+1 4
)=3 8
,1 2
x-
=5 8
,1 2
x-
+5 8
=5 8
+1 2
,5 8
x=1
;1 8
(3)2(x-7)=8.96,
2(x-7)÷2=8.96÷2,
x-7+7=4.48+7,
x=11.48.