题目内容
解方程:
x÷
| 3x-
|
| ||||||||||||||
| 25:20=(x+6):28 |
|
|
①x÷
=
x×
=
x×
=
×
x=
②3x-
=
3x-
+
=
+
3x=
3x×
=
×
x=
③
x+
x=
x+
x=
x=
x×
=
×
x=4
④25:20=(x+6):28
20x+120=25×28
20x+120=700
20x+120-120=700-120
20x=580
20x÷20=580÷20
x=29
⑤
:
=x:
x=
x×
=
×
x=
⑥
=
2.5x=12.5×8
2.5x=100
2.5x÷2.5=100÷2.5
x=40
| 5 |
| 27 |
| 9 |
| 10 |
x×
| 27 |
| 5 |
| 9 |
| 10 |
| 27 |
| 5 |
| 5 |
| 27 |
| 9 |
| 10 |
| 5 |
| 27 |
x=
| 1 |
| 6 |
②3x-
| 5 |
| 6 |
| 1 |
| 3 |
3x-
| 5 |
| 6 |
| 5 |
| 6 |
| 1 |
| 3 |
| 5 |
| 6 |
3x=
| 7 |
| 6 |
3x×
| 1 |
| 3 |
| 7 |
| 6 |
| 1 |
| 3 |
x=
| 7 |
| 18 |
③
| 1 |
| 3 |
| 3 |
| 4 |
| 26 |
| 5 |
| 4 |
| 12 |
| 9 |
| 12 |
| 26 |
| 5 |
| 13 |
| 12 |
| 26 |
| 5 |
| 13 |
| 12 |
| 12 |
| 13 |
| 26 |
| 5 |
| 12 |
| 13 |
x=4
| 4 |
| 5 |
④25:20=(x+6):28
20x+120=25×28
20x+120=700
20x+120-120=700-120
20x=580
20x÷20=580÷20
x=29
⑤
| 3 |
| 4 |
| 9 |
| 10 |
| 3 |
| 5 |
| 9 |
| 10 |
| 9 |
| 20 |
| 9 |
| 10 |
| 10 |
| 9 |
| 9 |
| 20 |
| 10 |
| 9 |
x=
| 1 |
| 2 |
⑥
| 12.5 |
| 2.5 |
| x |
| 8 |
2.5x=12.5×8
2.5x=100
2.5x÷2.5=100÷2.5
x=40
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