题目内容
解方程
x+30%x=526×9-
x=26.85x-5×25%=
.
x+30%x=526×9-
| 1 |
| 2 |
| 8 |
| 5 |
(1)x+30%x=52,
1.3x=52,
1.3x÷1.3=52÷1.3,
x=40;
(2)6×9-
x=26.8,
54-
x=26.8,
54-
x+
x=26.8+
x,
54-26.8=26.8+
x-26.8,
27.2÷
=
x÷
,
x=54.4;
(3)5x-5×25%=
,
5x-1.25=
,
5x-1.25+1.25=
+1.25,
5x÷5=2.85÷5,
x=0.57.
1.3x=52,
1.3x÷1.3=52÷1.3,
x=40;
(2)6×9-
| 1 |
| 2 |
54-
| 1 |
| 2 |
54-
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 2 |
54-26.8=26.8+
| 1 |
| 2 |
27.2÷
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 2 |
x=54.4;
(3)5x-5×25%=
| 8 |
| 5 |
5x-1.25=
| 8 |
| 5 |
5x-1.25+1.25=
| 8 |
| 5 |
5x÷5=2.85÷5,
x=0.57.
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