问题
解答题
求未知数X: 5X+96=131 X:21=
|
答案
(1)5X+96=131,
5X+96-96=131-96,
5X=35,
5X÷5=35÷5,
X=7;
(2)X:21=
:3,1 2
3X=21×
,1 2
3X÷3=21×
÷3,1 2
X=
.7 2
求未知数X: 5X+96=131 X:21=
|
(1)5X+96=131,
5X+96-96=131-96,
5X=35,
5X÷5=35÷5,
X=7;
(2)X:21=
:3,1 2
3X=21×
,1 2
3X÷3=21×
÷3,1 2
X=
.7 2