题目内容
解方程.
| 1.5x+30%x=3.6 | 19-120%x=7 | 0.2:x=
|
(1)1.5x+30%x=3.6,
1.8x=3.6,
1.8x÷1.8=3.6÷1.8,
x=2,
(2)19-120%x=7,
19-120%x+120%x-7=7+120%x-7,
12=120%x,
120%x=12,
120%x÷120%=12÷120%,
x=10,
(3)0.2:x=
×30%,
x=0.2×30%,
x×
=0.06×
,
x=0.45.
1.8x=3.6,
1.8x÷1.8=3.6÷1.8,
x=2,
(2)19-120%x=7,
19-120%x+120%x-7=7+120%x-7,
12=120%x,
120%x=12,
120%x÷120%=12÷120%,
x=10,
(3)0.2:x=
| 2 |
| 15 |
| 2 |
| 15 |
| 2 |
| 15 |
| 15 |
| 2 |
| 15 |
| 2 |
x=0.45.
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