问题
解答题
求未知数x的值. 39.5-5.5x=1
|
答案
(1)39.5-5.5x=1,
39.5-5.5x+5.5x=1+5.5x,
39.5-1=1+5.5x-1,
38.5=5.5x,
38.5÷5.5=5.5x÷5.5,
x=7;
(2)
:x=1 3
:1 4
,6 7
x=1 4
×1 3
,6 7
x÷1 4
=1 4
÷2 7
,1 4
x=1
.1 7
求未知数x的值. 39.5-5.5x=1
|
(1)39.5-5.5x=1,
39.5-5.5x+5.5x=1+5.5x,
39.5-1=1+5.5x-1,
38.5=5.5x,
38.5÷5.5=5.5x÷5.5,
x=7;
(2)
:x=1 3
:1 4
,6 7
x=1 4
×1 3
,6 7
x÷1 4
=1 4
÷2 7
,1 4
x=1
.1 7