解方程:(1)-7x=2+2x-4 (2)4-2/5x=5/2-x (3)2/5x-4=6+3/5x (4)-2x+1=
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解方程:(1)-7x=2+2x-4 (2)4-2/5x=5/2-x (3)2/5x-4=6+3/5x (4)-2x+1=4x+4
![解方程:(1)-7x=2+2x-4 (2)4-2/5x=5/2-x (3)2/5x-4=6+3/5x (4)-2x+1=](/uploads/image/z/8433258-42-8.jpg?t=%E8%A7%A3%E6%96%B9%E7%A8%8B%EF%BC%9A%EF%BC%881%EF%BC%89-7x%3D2%2B2x-4+%EF%BC%882%294-2%2F5x%3D5%2F2-x+%283%292%2F5x-4%3D6%2B3%2F5x+%284%29-2x%2B1%3D)
(1)-7x=2+2x-4
-9x=-2
x=2/9
(2)4-2/5x=5/2-x
3/5x=-3/2
x=-5/2
(3)2/5x-4=6+3/5x
-1/5x=10
x=-50
(4)-2x+1=4x+4
-6x=3
x=-1/2
-9x=-2
x=2/9
(2)4-2/5x=5/2-x
3/5x=-3/2
x=-5/2
(3)2/5x-4=6+3/5x
-1/5x=10
x=-50
(4)-2x+1=4x+4
-6x=3
x=-1/2
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