解不等式或方程(组):
(1)
-=;
(2)
-1≥;
(3)-1<
≤1;
(4)
;
(5)
| x:2y=4:3① | (2x-1):(4y+1)=3:4② |
| |
;
(6)
| 2x+1<3x-1;① | 2x-1>x+2;② | x-4≤0;③ |
| |
.
人气:109 ℃ 时间:2020-06-29 01:44:53
解答
(1)6(4x+9)-10(3+2x)=15(x-5)24x+54-30-20=15x-459x=81x=9.(2)2(x-1)-10≥5x2x-2-10≥5x-3x≥12x≤-4.(3)3-x≤53-x>-5由①得x≥-2,由②得x<8,∴解集为:-2≤x<8.(4)②×3-①×5得38y=76,解...
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