问题
解答题
|
答案
(1)X-
X=2 7
,3 21
X=5 7
,3 21
X÷5 7
=5 7
÷3 21
,5 7
X=
;1 5
(2)
=X-1 2
,0.15 0.6
0.6(X-1)=0.15×2,
0.6(X-1)=0.3,
0.6(X-1)÷0.6=0.3÷0.6,
X-1=0.5,
X-1+1=0.5+1,
X=1.5.
|
(1)X-
X=2 7
,3 21
X=5 7
,3 21
X÷5 7
=5 7
÷3 21
,5 7
X=
;1 5
(2)
=X-1 2
,0.15 0.6
0.6(X-1)=0.15×2,
0.6(X-1)=0.3,
0.6(X-1)÷0.6=0.3÷0.6,
X-1=0.5,
X-1+1=0.5+1,
X=1.5.