问题
解答题
解方程.
|
答案
(1)x:0.75=
,5 6
x÷0.75=
,5 6
x÷0.75×0.75=
×0.75,5 6
x=0.625;
(2)x+
=240,x 5
x=240,6 5
x÷6 5
=240÷6 5
,6 5
x=200;
(3)3x-120%x=45,
1.8x=45,
1.8x÷1.8=45÷1.8,
x=25.
解方程.
|
(1)x:0.75=
,5 6
x÷0.75=
,5 6
x÷0.75×0.75=
×0.75,5 6
x=0.625;
(2)x+
=240,x 5
x=240,6 5
x÷6 5
=240÷6 5
,6 5
x=200;
(3)3x-120%x=45,
1.8x=45,
1.8x÷1.8=45÷1.8,
x=25.