问题
解答题
解方程.
|
答案
(1)9÷
x=3 4
,1 3
9÷
x×3 4
x=3 4
×1 3
x,3 4
9=
x,1 4
9×4=
x×4,1 4
x=36;
(2)1-25%x=0.5,
1-0.25x+0.25x=0.5+0.25x,
1-0.5=0.5+0.25x-0.5,
0.5÷0.25=0.25x÷0.25,
x=2.
解方程.
|
(1)9÷
x=3 4
,1 3
9÷
x×3 4
x=3 4
×1 3
x,3 4
9=
x,1 4
9×4=
x×4,1 4
x=36;
(2)1-25%x=0.5,
1-0.25x+0.25x=0.5+0.25x,
1-0.5=0.5+0.25x-0.5,
0.5÷0.25=0.25x÷0.25,
x=2.