题目内容
(1)解方程:
-2=y;
(2)解不等式:
-
>
.
| y-1 |
| 2 |
(2)解不等式:
| 2x |
| 7 |
| 6-5x |
| 14 |
| 3 |
| 2 |
(1)
-2=y,
-
-2=y,
-
=y,
-
-
=y-
,
=-
,
×2=-
×2,
y=-5;
(2)
-
>
,
(
-
)×14>
×14,
4x-6+5x>21,
9x-6>21,
9x-6+6>21+6,
9x÷9>27÷9,
x>3.
| y-1 |
| 2 |
| y |
| 2 |
| 1 |
| 2 |
| y |
| 2 |
| 5 |
| 2 |
| y |
| 2 |
| 5 |
| 2 |
| y |
| 2 |
| y |
| 2 |
| y |
| 2 |
| 5 |
| 2 |
| y |
| 2 |
| 5 |
| 2 |
y=-5;
(2)
| 2x |
| 7 |
| 6-5x |
| 14 |
| 3 |
| 2 |
(
| 2x |
| 7 |
| 6-5x |
| 14 |
| 3 |
| 2 |
4x-6+5x>21,
9x-6>21,
9x-6+6>21+6,
9x÷9>27÷9,
x>3.
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