问题
解答题
解方程:
x-25%x=7.5. |
答案
(1)
x-1 5
=1 5
,1 5
x-1 5
+1 5
=1 5
+1 5
,1 5
x×5=1 5
×5,2 5
x=2;
(2)x-25%x=7.5,
0.75x=7.5,
0.75x÷0.75=7.5÷0.75,
x=10.
解方程:
x-25%x=7.5. |
(1)
x-1 5
=1 5
,1 5
x-1 5
+1 5
=1 5
+1 5
,1 5
x×5=1 5
×5,2 5
x=2;
(2)x-25%x=7.5,
0.75x=7.5,
0.75x÷0.75=7.5÷0.75,
x=10.