题目内容
求未知数x:
(1)2.4×1.5+1.2x-0.6=7.2(2)
:18%=
.
(1)2.4×1.5+1.2x-0.6=7.2(2)
| 3 |
| 20 |
| 6.5 |
| x |
(1)2.4×1.5+1.2x-0.6=7.2,
3.6+1.2x-0.6=7.2,
1.2x+3=7.2,
1.2x+3-3=7.2-3,
1.2x÷1.2=4.2÷1.2,
x=3.5;
(2)
:18%=
,
x=18%×6.5,
x×
=
×
,
x=7
.
3.6+1.2x-0.6=7.2,
1.2x+3=7.2,
1.2x+3-3=7.2-3,
1.2x÷1.2=4.2÷1.2,
x=3.5;
(2)
| 3 |
| 20 |
| 6.5 |
| x |
| 3 |
| 20 |
| 3 |
| 20 |
| 20 |
| 3 |
| 117 |
| 100 |
| 20 |
| 3 |
x=7
| 4 |
| 5 |
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