不要忘寫解啊,時間關(guān)系我不寫了.
1.-2x-7=9-10x
8x=16
x=2
2.0.35x-1.5=2.15x+3.5
2.5X=-5
x=-2
3.3-8(x1/4-5/2)=3x
3-(2x-20) =3X
3-2x+20=3x
5x=23
x=4.6
4.沒看懂你寫的什么
5.(3/3=1)
1-x-x/2-2=1
1-3/2X =3
3/2x=-2
x=-4/3
6.x/2+1=15x/4 -17
2x/4+1=15x/4 -17
2x+4=15x-68
13X=72
X=72/13(愿意弄真分數(shù)也可以.隨便,一樣.)
7.-2/3-5/6+1/9-1/6
=-4/6-5/6+1/9-1/6
=-10/6-1/9
=-30/18-2/18
=-32/18
=-16/9
8.沒看懂.