几道一元一次方程,1.3x+1/5-x-5/2=1 2.1/2(x-3)-1/3(x-2)=5x/63.-6/5x-3=3/4 4.2x+1/3-10x+1/6=15.x-1/2[x-1/2(x-1)]=2/3(x-1)

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几道一元一次方程,1.3x+1/5-x-5/2=12.1/2(x-3)-1/3(x-2)=5x/63.-6/5x-3=3/44.2x+1/3-10x+1/6=15.x-1/2[x-1/2(x-1)]=

几道一元一次方程,1.3x+1/5-x-5/2=1 2.1/2(x-3)-1/3(x-2)=5x/63.-6/5x-3=3/4 4.2x+1/3-10x+1/6=15.x-1/2[x-1/2(x-1)]=2/3(x-1)
几道一元一次方程,
1.3x+1/5-x-5/2=1 2.1/2(x-3)-1/3(x-2)=5x/6
3.-6/5x-3=3/4 4.2x+1/3-10x+1/6=1
5.x-1/2[x-1/2(x-1)]=2/3(x-1)

几道一元一次方程,1.3x+1/5-x-5/2=1 2.1/2(x-3)-1/3(x-2)=5x/63.-6/5x-3=3/4 4.2x+1/3-10x+1/6=15.x-1/2[x-1/2(x-1)]=2/3(x-1)
1.3x+1/5-x-5/2=1
30x+6-10x-25=10
20x=25+10-6
20x=29
x=29/20=14.5
2.1/2(x-3)-1/3(x-2)=5x/6
3(x-3)-2(x-2)=5x
3x-9-2x+4=5x
4x=-5
x=-5/4
3.-6/5x-3=3/4
-24x-60=15
24x=-75
x=-25/8
4.2x+1/3-10x+1/6=1
12x+2-60x+1=6
-48x=6-2-1
-48x=3
x=-1/16
5.x-1/2[x-1/2(x-1)]=2/3(x-1)
6x-3(x/2+1/2)=4x-4
12x-3x-3=8x-8
12x-3x-8x=-8+3
x=-5