求未知数x.(1)12÷(0.5x-1)=6 (2)12:x...
求未知数x.(1)12÷(0.5x-1)=6(2)12:x=18:14(3)x-20%x=2.4....
求未知数x.(1)12÷(0.5x-1)=6 (2)12:x=18:14 (3)x-20%x=2.4.
展开
1个回答
展开全部
(1)12÷(0.5x-1)=6,
12÷(0.5x-1)×(0.5x-1)=6(0.5x-1),
6(0.5x-1)=12,
6(0.5x-1)÷6=12÷6,
0.5x-1=2,
0.5x-1+1=2+1,
0.5x=3,
0.5x÷0.5=3÷0.5,
x=6;
(2)12:x=
:
,
x=12×
,
x=3,
x÷
=3÷
,
x=24;
(3)x-20%x=2.4,
0.8x=2.4,
0.8x÷0.8=2.4÷0.8,
x=3.
12÷(0.5x-1)×(0.5x-1)=6(0.5x-1),
6(0.5x-1)=12,
6(0.5x-1)÷6=12÷6,
0.5x-1=2,
0.5x-1+1=2+1,
0.5x=3,
0.5x÷0.5=3÷0.5,
x=6;
(2)12:x=
1 |
8 |
1 |
4 |
1 |
8 |
1 |
4 |
1 |
8 |
1 |
8 |
1 |
8 |
1 |
8 |
x=24;
(3)x-20%x=2.4,
0.8x=2.4,
0.8x÷0.8=2.4÷0.8,
x=3.
推荐律师服务:
若未解决您的问题,请您详细描述您的问题,通过百度律临进行免费专业咨询