问题
解答题
解方程
|
答案
(1)x-
=2 5
,3 10
x-
+2 5
=2 5
+3 10
,2 5
x=
,7 10
(2)x-0.8x=22,
0.2x=22,
0.2x÷0.2=22÷0.2,
x=110,
(3)2x+0.9×3=24.7,
2x+2.7=24.7,
2x+2.7-2.7=24.7-2.7,
2x=22,
x=11.
解方程
|
(1)x-
=2 5
,3 10
x-
+2 5
=2 5
+3 10
,2 5
x=
,7 10
(2)x-0.8x=22,
0.2x=22,
0.2x÷0.2=22÷0.2,
x=110,
(3)2x+0.9×3=24.7,
2x+2.7=24.7,
2x+2.7-2.7=24.7-2.7,
2x=22,
x=11.