题目内容
(1)x-
| (2)20%x+1.5=23 | (3)1.5x+20%x=5.95 | ||||||
| (4)4.8:x=3.2:24 | (5)
| (6)(x-2)×3=0.18. |
(1)x-
x=
,
(1-
)x=
,
x=
,
x÷
=
÷
,
x=
×
,
x=
;
(2)20%x+1.5=23,
0.2x+1.5-1.5=23-1.5,
0.2x=21.5,
0.2x÷0.2=21.5÷0.2,
x=107.5;
(3)1.5x+20%x=5.95,
(1.5+0.2)x=5.95,
1.7x=5.95,
1.7x÷1.7=5.95÷1.7,
x=3.5;
(4)4.8:x=3.2:24,
3.2x=4.8×24,
3.2x=115.2,
3.2x÷3.2=115.2÷3.2,
x=36;
(5)
:
=x:
,
7:2=x:
,
2x=7×
,
2x=
,
2x÷2=
÷2,
x=
×
,
x=
;
(6)(x-2)×3=0.18,
3x-6=0.18,
3x-6+6=0.18+6,
3x=6.18,
3x÷3=6.18÷3,
x=2.06.
| 3 |
| 5 |
| 3 |
| 5 |
(1-
| 3 |
| 5 |
| 3 |
| 5 |
| 2 |
| 5 |
| 3 |
| 5 |
| 2 |
| 5 |
| 2 |
| 5 |
| 3 |
| 5 |
| 2 |
| 5 |
x=
| 3 |
| 5 |
| 5 |
| 2 |
x=
| 3 |
| 2 |
(2)20%x+1.5=23,
0.2x+1.5-1.5=23-1.5,
0.2x=21.5,
0.2x÷0.2=21.5÷0.2,
x=107.5;
(3)1.5x+20%x=5.95,
(1.5+0.2)x=5.95,
1.7x=5.95,
1.7x÷1.7=5.95÷1.7,
x=3.5;
(4)4.8:x=3.2:24,
3.2x=4.8×24,
3.2x=115.2,
3.2x÷3.2=115.2÷3.2,
x=36;
(5)
| 7 |
| 9 |
| 2 |
| 9 |
| 2 |
| 5 |
7:2=x:
| 2 |
| 5 |
2x=7×
| 2 |
| 5 |
2x=
| 14 |
| 5 |
2x÷2=
| 14 |
| 5 |
x=
| 14 |
| 5 |
| 1 |
| 2 |
x=
| 7 |
| 5 |
(6)(x-2)×3=0.18,
3x-6=0.18,
3x-6+6=0.18+6,
3x=6.18,
3x÷3=6.18÷3,
x=2.06.
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