问题
解答题
求未知数x. 12-5x=6.5
|
答案
(1)12-5x=6.5,
5x=12-6.5,
5x=5.5
x=1.1;
(2)
=22.5 4
,x 5
4x=22.5×5,
4x=112.5,
x=28.125;
(3)
:x=9 16
,3 16
3x=
×16,9 16
3x=9,
x=3.
求未知数x. 12-5x=6.5
|
(1)12-5x=6.5,
5x=12-6.5,
5x=5.5
x=1.1;
(2)
=22.5 4
,x 5
4x=22.5×5,
4x=112.5,
x=28.125;
(3)
:x=9 16
,3 16
3x=
×16,9 16
3x=9,
x=3.