问题
解答题
求未知数X 2X+2.7=24.7 X-
42:
|
答案
(1)2X+2.7=24.7,
2x+2.7-2.7=24.7-2.7,
2x÷2=22÷2,
x=11;
(2)x-
x=2 3
,1 3
x=1 3
,1 3
x×3=1 3
×3,1 3
x=1;
(3)42:
=x:1 3
,5 7
x=42×1 3
,5 7
x×3=30×3,1 3
x=90.
求未知数X 2X+2.7=24.7 X-
42:
|
(1)2X+2.7=24.7,
2x+2.7-2.7=24.7-2.7,
2x÷2=22÷2,
x=11;
(2)x-
x=2 3
,1 3
x=1 3
,1 3
x×3=1 3
×3,1 3
x=1;
(3)42:
=x:1 3
,5 7
x=42×1 3
,5 7
x×3=30×3,1 3
x=90.