解下列方程(有过程)x/7-2=x 7x-8=11x-4 2.5+7.5x=11x-4 3/4x-2=1.5x+2.5

2个回答

  • 1:x/7-2=x

    -6x/7=2

    -6x=14

    x=-7/3

    2:7x-8=11x-4

    -4x=4

    x=-1

    3:2.5+7.5x=11x-4

    -3.5x=-6.5

    x=13/7

    4:3-(4x-3)=6

    3-4x+3=6

    -4x=0

    x=0

    5:2x+6=2-(1+x)

    2x+6=2-1-x

    3x=-5

    x=-5/3

    6:3x-(4x-5)=6+(2-5x)

    3x-4x+5=6+2-5x

    4x=3

    x=3/4

    5:5x-3(2x-1)=11

    5x-6x+3=11

    -x=8

    x=-8

    6:2(3/2x-6)-3(2x-7/3)=5(x-1)

    3x-12-6x+7=5x-5

    -8x=0

    x=0

    7:3-(2x-1)=2(x+1)

    3-2x+1=2x+2

    -4x=-2

    x=1/2