文档介绍：(+x)+x=÷22(X+X+)=+x=6x3200=450+5X+XX-=612x-8x=*2X==+=-=÷x=+==33x-8=167(x-2)=2x+33x+9=2718(x-2)=27012x=300-4x7x+=÷5=÷x+25=×8-2x=66x-×3=-3x=1703(x+)=+8=436x-3x=+18=3x5×3-x÷2=÷x==÷=909x-40=5x÷5+9=2148-27+5x=+x+21=56x+2x+18=78(200-x)÷5=30(x-140)÷70=(x+6)=×(x-)=(+x)=(-)÷x=4x+==-x=÷x=+=(x+8)=102x+3x+10=703(x+3)=50-x+35x+15=-5x=×7+4x=÷-=-×6=-9x=×+=×2+3x=6902x-20=43x+6=182(+x)=(x-3)÷2=+9x==x+100x+=+18=483(x+)=-9x=(x+5)=1692x-97=-48=+25x=(x+)=(x-3)=+7=429x+4×=+=+=5189x-43x=-45=-==2x=564x-x=-x=28X-=-2X=183X+=×2=+x26×=2x+×16―16×=-X=÷X==14x+14x+14x=653-5x=+6x=-=+4x=402x+8=1623x-14x=14x+7x=89x-3x=66x-8=45x+x=9x-8=6x4/5x=202x-6=127x+7=146x-6=05x+6=112x-8=101/2x-