题目内容
解方程.
(1)8X+1.5×3=16.5
(2)
=
:
.
(1)8X+1.5×3=16.5
(2)
| 4 |
| x |
| 2 |
| 3 |
| 2 |
| 5 |
(1)8X+1.5×3=16.5,
8X+4.5=16.5,
8X+4.5-4.5=16.5-4.5,
8x=12,
8x÷8=12÷8,
x=1.5;
(2)
=
:
,
=
,
5x=12,
5x÷5=12÷5,
x=2.4.
8X+4.5=16.5,
8X+4.5-4.5=16.5-4.5,
8x=12,
8x÷8=12÷8,
x=1.5;
(2)
| 4 |
| x |
| 2 |
| 3 |
| 2 |
| 5 |
| 4 |
| x |
| 5 |
| 3 |
5x=12,
5x÷5=12÷5,
x=2.4.
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