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解方程:(1)2x+13−5x−16=1(2)1−x+23=x−12(3)x−32−4x+15=1(4)119y+27=29y-57(5)x−25-x+310-2x−53+3=0(6)5x+16=9x+18-1−x3.
题目详情
解方程:
(1)
−
=1
(2)1−
=
(3)
−
=1
(4)
y+
=
y-
(5)
-
-
+3=0
(6)
=
-
.
(1)
2x+1 |
3 |
5x−1 |
6 |
(2)1−
x+2 |
3 |
x−1 |
2 |
(3)
x−3 |
2 |
4x+1 |
5 |
(4)
11 |
9 |
2 |
7 |
2 |
9 |
5 |
7 |
(5)
x−2 |
5 |
x+3 |
10 |
2x−5 |
3 |
(6)
5x+1 |
6 |
9x+1 |
8 |
1−x |
3 |
▼优质解答
答案和解析
(1)去分母得:2(2x+1)-(5x-1)=6,
去括号得:4x+2-5x+1=6,
移项合并得:-x=3,
解得:x=-3;
(2)去分母得:6-2(x+2)=3(x-1),
去括号得:6-2x-4=3x-3,
移项合并得:5x=5,
解得:x=1;
(3)去分母得:5(x-3)-2(4x+1)=10,
去括号后得:5x-15-8x-2=10,
移项合并得:-3x=27,
解得:x=-9;
(4)去分母得:77y+18=14y-45,
移项合并得:63y=-63,
解得:y=-1;
(5)去分母得:6(x-2)-3(x+3)-10(2x-5)+90=0,
去括号得:6x-12-3x-9-20x+50+90=0,
移项合并得:-17x=119,
解得:x=-7;
(6)去分母得:4(5x+1)=3(9x+1)-8(1-x),
去括号得:20x+4=27x+3-8+8x,
移项合并得:15x=9,
解得:x=
.
去括号得:4x+2-5x+1=6,
移项合并得:-x=3,
解得:x=-3;
(2)去分母得:6-2(x+2)=3(x-1),
去括号得:6-2x-4=3x-3,
移项合并得:5x=5,
解得:x=1;
(3)去分母得:5(x-3)-2(4x+1)=10,
去括号后得:5x-15-8x-2=10,
移项合并得:-3x=27,
解得:x=-9;
(4)去分母得:77y+18=14y-45,
移项合并得:63y=-63,
解得:y=-1;
(5)去分母得:6(x-2)-3(x+3)-10(2x-5)+90=0,
去括号得:6x-12-3x-9-20x+50+90=0,
移项合并得:-17x=119,
解得:x=-7;
(6)去分母得:4(5x+1)=3(9x+1)-8(1-x),
去括号得:20x+4=27x+3-8+8x,
移项合并得:15x=9,
解得:x=
3 |
5 |
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