题目内容
解方程.
5.4x+2.6x=840
x=30
8x-
=
.
5.4x+2.6x=840
| 5 |
| 6 |
8x-
| 1 |
| 3 |
| 1 |
| 9 |
(1)5.4x+2.6x=840,
8x=840,
8x÷8=840÷8,
x=105;
(2)
x=30,
x×
=30×
,
x=36;
(3)8x-
=
,
8x-
+
=
+
,
8x÷8=
÷8,
x=
.
8x=840,
8x÷8=840÷8,
x=105;
(2)
| 5 |
| 6 |
| 5 |
| 6 |
| 6 |
| 5 |
| 6 |
| 5 |
x=36;
(3)8x-
| 1 |
| 3 |
| 1 |
| 9 |
8x-
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 9 |
| 1 |
| 3 |
8x÷8=
| 4 |
| 9 |
x=
| 1 |
| 18 |
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