解不等式或方程(組)
(1)3x-2=5x+6;
(2)12x-x-16=1;
(3)0.4x+0.90.5-0.03+0.02x0.03=x-52;
(4)|2x-1|-2=9;
(5)3x+y=4 2x-3y=-1
;
(6)x:y:z=2:3:5 2x+3y-z=16
;
(7)x-15-1≥x2;
(8)4(x-2)-3(x+3)>-x;
(9)2-3(x-1)≤2x+15 143-2-4x3≥2x
;
(10)3+x<2+2(1+x) 5x-3<4x-1 7+2x>6+3x
.
1
2
x
-
x
-
1
6
=
1
0
.
4
x
+
0
.
9
0
.
5
-
0
.
03
+
0
.
02
x
0
.
03
=
x
-
5
2
3 x + y = 4 |
2 x - 3 y = - 1 |
x : y : z = 2 : 3 : 5 |
2 x + 3 y - z = 16 |
x
-
1
5
-
1
≥
x
2
2 - 3 ( x - 1 ) ≤ 2 x + 15 |
14 3 - 2 - 4 x 3 ≥ 2 x |
3 + x < 2 + 2 ( 1 + x ) |
5 x - 3 < 4 x - 1 |
7 + 2 x > 6 + 3 x |
【答案】(1)x=-4;
(2)x=;
(3)x=9;
(4)x=6或-5;
(5)
;
(6)
;
(7)x≤-4;
(8)x>;
(9)-2≤x≤6;
(10)-1<x<1.
(2)x=
5
2
(3)x=9;
(4)x=6或-5;
(5)
x = 1 |
y = 1 |
(6)
x = 4 |
y = 6 |
z = 10 |
(7)x≤-4;
(8)x>
17
2
(9)-2≤x≤6;
(10)-1<x<1.
【解答】
【點(diǎn)評(píng)】
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發(fā)布:2025/6/6 12:0:1組卷:341引用:1難度:0.5