问题
解答题
解方程. 4÷
x-1.4+1.6=3
|
答案
(1)4÷
X=2 3
,2 5
4×
X=3 2
,2 5
6X=
,2 5
6X÷6=
÷6,2 5
X=
×2 5
,1 6
X=
;1 15
(2)x-1.4+1.6=3,
x+(1.6-1.4)=3,
x+0.2=3,
x+0.2-0.2=3-0.2,
x=2.8;
(3)
:18%=3 20
,6.5 x
5:6=6.5:x,
5x=6×6.5,
5x=39,
5x÷5=39÷5,
x=
.39 5