问题
解答题
解方程.
|
答案
(1)2X+3×0.9=24.7,
2x+2.7=24.7,
2x+2.7-2.7=24.7-2.7,
2x=22,
2x÷2=22÷2,
x=11;
(2)
x-3 8
x=3 16
,3 8
(
-3 8
)x=3 16
,3 8
x=3 16
,3 8
x÷3 16
=3 16
÷3 8
,3 16
x=2;
解方程.
|
(1)2X+3×0.9=24.7,
2x+2.7=24.7,
2x+2.7-2.7=24.7-2.7,
2x=22,
2x÷2=22÷2,
x=11;
(2)
x-3 8
x=3 16
,3 8
(
-3 8
)x=3 16
,3 8
x=3 16
,3 8
x÷3 16
=3 16
÷3 8
,3 16
x=2;