问题
解答题
求未知数X
|
答案
(1)
=x 25
,1.2 75
75x=25×1.2,
75x÷75=25×1.2÷75,
x=0.4;
(2)2X+
=1,3 4
2X+
-3 4
=1-3 4
,3 4
2x=
,1 4
2x÷2=
÷2,1 4
x=
;1 8
(3)X÷
=3 4
,5 6
X÷
×3 4
=3 4
×5 6
,3 4
x=
;5 8
(4)4x+18=50,
4x+18-18=50-18,
4x=32,
4x÷4=32÷4,
x=8.