问题
解答题
解方程: x÷
y-60%y=20;
|
答案
(1)x÷
=40,3 4
x÷
×3 4
=40×3 4
,3 4
x=30;
(2)y-60%y=20,
(1-60%)y=20,
40%y=20,
0.4y÷0.4=20÷0.4,
y=50;
(3)
+3 8
m=3 8
,5 8
+3 8
m-3 8
=3 8
-5 8
,3 8
m=3 8
,1 4
m×3 8
=8 3
×1 4
,8 3
m=
.2 3