题目内容
| 求未知数x. x-0.8x-1.6=1.4 |
|
(1)x-0.8x-1.6=1.4,
0.2x-1.6=1.4,
0.2x-1.6+1.6=1.4+1.6,
0.2x=3,
0.2x÷0.2=3÷0.2,
x=15;
(2)
:
=
,
x=
×12,
x=8,
x÷
=8÷
,
x=
.
0.2x-1.6=1.4,
0.2x-1.6+1.6=1.4+1.6,
0.2x=3,
0.2x÷0.2=3÷0.2,
x=15;
(2)
| 2 |
| 3 |
| 3 |
| 4 |
| x |
| 12 |
| 3 |
| 4 |
| 2 |
| 3 |
| 3 |
| 4 |
| 3 |
| 4 |
| 3 |
| 4 |
| 3 |
| 4 |
x=
| 32 |
| 3 |
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