问题
解答题
求未知数X的值: 0.75X-5×
|
答案
(1)0.75X-5×
=1.5,1 2
0.75X-2.5+2.5=1.5+2.5,
0.75x=4,
0.75x÷0.75=4÷0.75,
x=5
;1 3
(2)
:X=44 5
:10,1 2
4
x=1 2
×10,4 5
4
x÷41 2
=8÷41 2
,1 2
x=1
.7 9
求未知数X的值: 0.75X-5×
|
(1)0.75X-5×
=1.5,1 2
0.75X-2.5+2.5=1.5+2.5,
0.75x=4,
0.75x÷0.75=4÷0.75,
x=5
;1 3
(2)
:X=44 5
:10,1 2
4
x=1 2
×10,4 5
4
x÷41 2
=8÷41 2
,1 2
x=1
.7 9