题目内容
解方程
| 4X+20%X=13.86 | 100+25%X=125 | X+
|
(1)4X+20%X=13.86,
(4+20%)X=13.86,
4.2x=13.86,
4.2x÷4.2=13.86÷4.2,
x=3.3;
(2)100+25%X=125,
100+25%X-100=125-100,
25%X=25,
25%X÷25%=25÷25%,
x=100;
(3)X+
X=300,
(1+
)X=300,
x=300,
x÷
=300÷
,
x=250.
(4+20%)X=13.86,
4.2x=13.86,
4.2x÷4.2=13.86÷4.2,
x=3.3;
(2)100+25%X=125,
100+25%X-100=125-100,
25%X=25,
25%X÷25%=25÷25%,
x=100;
(3)X+
| 1 |
| 5 |
(1+
| 1 |
| 5 |
| 6 |
| 5 |
| 6 |
| 5 |
| 6 |
| 5 |
| 6 |
| 5 |
x=250.
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