解方程17-2x+1=5,1/2=3x-1,4x-3（20-x）=3,6x+4/3=4x+5/4

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解方程17-2x+1=5,1/2=3x-1,4x-3（20-x）=3,6x+4/3=4x+5/4解方程17-2x+1=5,1/2=3x-1,4x-3（20-x）=3,6x+4/3=4x+5/4解方程1

解方程17-2x+1=5,1/2=3x-1,4x-3（20-x）=3,6x+4/3=4x+5/4
解方程17-2x+1=5,1/2=3x-1,4x-3（20-x）=3,6x+4/3=4x+5/4

解方程17-2x+1=5,1/2=3x-1,4x-3（20-x）=3,6x+4/3=4x+5/4
17-2x+1=5
-2x = 5 - 18
-2x = -13
x = 13/2
1/2=3x-1
3x = 1/2 + 1
3x = 3/2
x = 1/2
4x-3（20-x）=3
4x - 60 + 3x = 3
7x = 3 + 60
7x = 63
x = 9
6x+4/3=4x+5/4
6x - 4x = 5/4 - 4/3
2x = -1/12
x = -1/24

17-2x+1=5
2x=13
x=13/2
1/2=3x-1，
3x=3/2
x=1/2
4x-3（20-x）=3，
4x-60+3x=3
7x=63
x=9
6x+4/3=4x+5/4
2x=5/4-4/3=-1/12
x=-1/24

17-2(x+1)=5，
17-2x-2=5
-2x = 5-17+2 = -10
x=5
1/2=3x-1，
-3x = -1-1/2 = -3/2
x = 1/2
4x-3（20-x）=3，
4x-60+3x=3
7x=3+60=63
x=9
6x+4/3=4x+5/4
6x-4x=5/4-4/3
2x = (15-16)/12 = -1/12
x= -1/24

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