题目内容
解方程,我没问题
X:25=
5X-5×
=0.8
8(X-2)=2(X+7)
X:25=
| 2 |
| 5 |
5X-5×
| 1 |
| 3 |
8(X-2)=2(X+7)
(1)X:25=
,
5x=25×2,
5x÷5=50÷5,
x=10;
(2)5x-5×
=0.8,
5x-
=0.8,
5x-
+
=0.8+
,
5x÷5=
÷5,
x=
;
(3)8(x-2)=2(x+7),
8x-16=2x+14,
8x-16-2x=2x+14-2x,
6x-16+16=14+16,
6x÷6=30÷6,
x=5.
| 2 |
| 5 |
5x=25×2,
5x÷5=50÷5,
x=10;
(2)5x-5×
| 1 |
| 3 |
5x-
| 5 |
| 3 |
5x-
| 5 |
| 3 |
| 5 |
| 3 |
| 5 |
| 3 |
5x÷5=
| 37 |
| 15 |
x=
| 37 |
| 75 |
(3)8(x-2)=2(x+7),
8x-16=2x+14,
8x-16-2x=2x+14-2x,
6x-16+16=14+16,
6x÷6=30÷6,
x=5.
练习册系列答案
相关题目