题目内容
解方程.
x×(1-
)=
x+
x=2
11x-50%=16
(x+
)×40%=8.
x×(1-
| 4 |
| 9 |
| 5 |
| 6 |
x+
| 7 |
| 9 |
11x-50%=16
(x+
| 2 |
| 7 |
(1)x×(1-
)=
,
x=
,
x×
=
×
,
x=
;
(2)x+
x=2,
x=2,
x×
=2×
,
x=
;
(3)11x-50%=16
11x-50%+50%=16+50%,
11x=16.5,
11x÷11=16.5÷11,
x=1.5;
(4)(x+
)×40%=8,
(x+
)×40%÷40%=8÷40%,
x+
=20,
x+
-
=20-
,
x=19
.
| 4 |
| 9 |
| 5 |
| 6 |
| 5 |
| 9 |
| 5 |
| 6 |
| 5 |
| 9 |
| 9 |
| 5 |
| 5 |
| 6 |
| 9 |
| 5 |
x=
| 3 |
| 2 |
(2)x+
| 7 |
| 9 |
| 16 |
| 9 |
| 16 |
| 9 |
| 9 |
| 16 |
| 9 |
| 16 |
x=
| 9 |
| 8 |
(3)11x-50%=16
11x-50%+50%=16+50%,
11x=16.5,
11x÷11=16.5÷11,
x=1.5;
(4)(x+
| 2 |
| 7 |
(x+
| 2 |
| 7 |
x+
| 2 |
| 7 |
x+
| 2 |
| 7 |
| 2 |
| 7 |
| 2 |
| 7 |
x=19
| 5 |
| 7 |
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