【急】几道初一方程题(1)2x=x+5(2)2x-1/2=-1/2x+2(3)5x+21=7-2x(4)11x+1=5(2x+1)以上四题均要求过程,

(1)2x=x+5
2x-x=5
x=5
(2)2x-1/2=-1/2x+2
2x+1/2x=2+1/2
2.5x=2.5
x=1
(3)5x+21=7-2x
5x+2x=7-21
7x=-14
x=-2
(4)11x+1=5(2x+1)
11x+1=10x+5
11x-10x=5-1
x=4

1)2x=x+5
2x-x=5
x=5
(2)2x-1/2=-1/2x+2
2x+1/2x=2+1/2
(2+1/2)x=2+1/2
x=1
(3)5x+21=7-2x
5x+2x=7-21
7x=-14
x=-2

(4)11x+1=5(2x+1)
11x+1=10x+5
11x-10x=5-1
x=4
希望采纳

(1)2x=x+5
2x-x=5
x=5
(2)2x-1/2=-1/2x+2
2x+1/2x=2+1/2
(2+1/2)x=2+1/2
x=1
(3)5x+21=7-2x
5x+2x=7-21
7x=-14
x=-2
(4)11x+1=5(2x+1)
11x+1=10x+5
11x-10x=5-1
x=4
肯定正确，放心吧！！！

(1) 2x=x+5; x=5
(2) 2x-1/2=-1/2x+2;2x+1/2x=2+1/2;2.5x=2.5; x=1
(3) 5x+21=7-2x;7x=-14; x=-2
(4) 11x+1=5(2x+1); 11x+1=10x+5; 11x-10x=5-1;x=4

（1）2x-x=5 x=5
（2）2x+(1/2)x=2+1/2 x=1
（3）5x+2x=7-21 x=-1
（4）11x+1=10x+5
11x-10x=5-1 x=4

(1)2x=x+5
2x-x=5
x=5
(2)2x-1/2=-1/2x+2
2x+1/2x=1/2+2
x=1
(3)5x+21=7-2x
5x+2x=7-21
7x=-14
x=-2
(4)11x+1=5(2x+1)
11x+1=10x+5
11x-10x=5-1
x=4
希望采纳

(1)2x-x=5 x=5
(2)4x-1=-x+4 x=1
(3)7x=-14 x=-2
(4)11x+1=10x+5 x=4

(1)2x=x+5
2x-x=5
x=5
(2)2x-1/2=-1/2x+2
2x+1/2x=2+1/2
(2+1/2)x=2+1/2
x=1
(3)5x+21=7-2x
5x+2x=7-21
7x=-14
x=-2
(4)11x+1=5(2x+1)
11x+1=10x+5
11x-10x=5-1
x=4

1。2x=x+5
2x-x=5
x=5
2。2x-1/2=-1/2+2
2x=2
x=1
3。5x+21=7-2x
5x+2x=7-21
7x=-14
x=-2
4。11x+1=5(2x+1)
11x+1=10x+5
11x-10x=5-1
x=4