题目内容
(1)
x+24=52 (2)x-
x=17 (3)4x+x=23.
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| 20 |
(1)
x+24=52
x+24-24=52-24
x×
=28×
x=70;
(2)x-
x=17
x(1-
)=17
x×
=17×
x=20;
(3)4x+x=23
5x=23
5x÷5=23÷5
x=4
.
| 2 |
| 5 |
| 2 |
| 5 |
| 2 |
| 5 |
| 5 |
| 2 |
| 5 |
| 2 |
x=70;
(2)x-
| 3 |
| 20 |
x(1-
| 3 |
| 20 |
| 17 |
| 20 |
| 20 |
| 17 |
| 20 |
| 17 |
x=20;
(3)4x+x=23
5x=23
5x÷5=23÷5
x=4
| 3 |
| 5 |
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