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