2019中考数学总复习第二轮纵向小专题复习专题4一元一次方程课件.ppt

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第二轮 纵向小专题复习,专题4 一元一次方程,1 解方程:4x-6=2(3x-1),解:4x-6=6x-2,4x-6x=6-2,-2x=4,x=-2.,2 解方程:2(x-1)-3(x+2)=12,解:2x-2-3x-6=12,2x-3x=12+2+6,-x=20,x=-20.,3 解方程:2x-3(x-1)=2+3(1-x).,解:2x-3x+3=2+3-3x,2x-3x+3x=2+3-3,2x=2,x=1.,4 解方程:,解:4(2x-3)-3(x+2)=12,8x-12-3x-6=12,8x-3x=12 +12+6,5x=30,x=6.,5 解方程: ,解:3(x-1)=24-2(4x-3),3x-3=24-8x+6,3x+8x=24+6+3,11x=33,x=3.,6先化简,再求值: ,,解:4x+2-(5x-1)=6,4x+2-5x+1=6,4x-5x=6-2-1,-x=3,x=-3.,谢谢!,

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