题目内容
求未知数x.
①4.5x-2x=16
②
=
.
①4.5x-2x=16
②
| 2.4 |
| x |
| 8 |
| 15 |
(1)4.5x-2x=16,
2.5x=16,
2.5x÷2.5=16÷2.5,
x=6.4;
(2)
=
,
8x=2.4×15,
8x÷8=36÷8,
x=4.5.
2.5x=16,
2.5x÷2.5=16÷2.5,
x=6.4;
(2)
| 2.4 |
| x |
| 8 |
| 15 |
8x=2.4×15,
8x÷8=36÷8,
x=4.5.
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