问题
解答题
|
答案
(1)x-
x=3 5
,3 5
(1-
)x=3 5
,3 5
x=2 5
,3 5
x÷2 5
=2 5
÷3 5
,2 5
x=
×3 5
,5 2
x=
;3 2
(2)20%x+1.5=23,
0.2x+1.5-1.5=23-1.5,
0.2x=21.5,
0.2x÷0.2=21.5÷0.2,
x=107.5;
(3)1.5x+20%x=5.95,
(1.5+0.2)x=5.95,
1.7x=5.95,
1.7x÷1.7=5.95÷1.7,
x=3.5;
(4)4.8:x=3.2:24,
3.2x=4.8×24,
3.2x=115.2,
3.2x÷3.2=115.2÷3.2,
x=36;
(5)
:7 9
=x:2 9
,2 5
7:2=x:
,2 5
2x=7×
,2 5
2x=
,14 5
2x÷2=
÷2,14 5
x=
×14 5
,1 2
x=
;7 5
(6)(x-2)×3=0.18,
3x-6=0.18,
3x-6+6=0.18+6,
3x=6.18,
3x÷3=6.18÷3,
x=2.06.