问题
解答题
求未知数x ①2x+30%x=9.2②x:0.75=
|
答案
①2x+30%x=9.2,
(2+30%)x=9.2,
2.3x=9.2,
2.3x÷2.3=9.2÷2.3,
x=4;
②x:0.75=
,5 6
6x=0.75×5,
6x=3.75,
6x÷6=3.75÷6,
x=0.625.
求未知数x ①2x+30%x=9.2②x:0.75=
|
①2x+30%x=9.2,
(2+30%)x=9.2,
2.3x=9.2,
2.3x÷2.3=9.2÷2.3,
x=4;
②x:0.75=
,5 6
6x=0.75×5,
6x=3.75,
6x÷6=3.75÷6,
x=0.625.