（x/5+180）+ 2*(x/5+180) = x

*-----------------------------------------------*| 6 4 X | 8 X X | X X 5 || X X X | X X X | X 7 8 || X X X | X X X | X X X ||---------------+---------------+--------------- || X X X | X X X | 5 1 X || X X X | X 6 X | X X X || 8 X X | 3 5 X | 2 X X || 解九宫格题目（X为未知数）9 X 2 X 7 X 8 X XX X 4 X X 9 X 6 X1 3 X 5 X X X X 24 X X 8 5 X X 1 XX 8 9 4 X 1 6 7 XX 1 X X 3 6 X X 88 X X X X 2 X 3 6X 5 X 6 X X 9 X XX X 7 X 4 X 2 X 1 填九宫格帮帮忙.x x 6 x x 7 x x 98 x x x 3 x 1 x x 9 x x 6 x 5 x 3 x x x 3 x x x x 1 8x x x 9 x 1 x x x2 1 x x x x 6 x x x 6 x 7 x 3 x x 1 x x 9 x 2 x x x 47 x x 8 x x 5 x x （x/5+180）+ 2*(x/5+180) = x x+3x-18+（x-5）/2=452 因式分解：（1）x^2-7x+6(2)x^2-5x+6(3)x^2-5x-6(4)x^2-7x+8(5)x^2-7x+12(6)x^2-7x-18 （2x-5）-x=18 计算（x*x+4x+5）/（x+2）-（x*x+6x+10）/（x+3）+1 解方程（x-2）X（x的平方-6x-9）=x(x-5)X(x-3) （x*x-5x）(x*x-5*x-2)-24分解因式 4.2-0.6x=3.6x 5x+2x=33.6 7x-4x=0.75 2x+7x+2.1=12 56x-32x-119=361 x+5=2x 3x+9=6x 4x-28=2x 2x+18=7x 5x=25*4-15x 7x-x+2*3=29.4 (28.8+5.5x+3.2）除2=71 x(x平方-1)+2X平方（X+1)-3X（2X-5）帮个忙 化简（x+2)(x的平方-6x-9）-（x-5)(x-3)x 60％x+25=40 x+30％x=52 19-120％x=7 4分之3x-5％x=17.5 x-10％x=18 （1-25％）x=36 2x+30％x=9.2 (x-1)（x-2）=0 （2x-1）²=9 x²-7x+6=0 x（x-1）=x 2x²-5x-12=0 2(x-1=(x-1)（x-2）=0 （2x-1）²=9 x²-7x+6=0 x（x-1）=x 2x²-5x-12=0 2(x-1=(x-1)（x-2） 2x²+3x-18=0 3x²+2x-5=0 x²-4x-7=0.解一元二 请问,这十道关于一元一次方程的题目我做对了吗?（1）2X+3X+4X=189X=18X=2(2)13X-15X+X=-3-1X=-3X=3(3)2.5X+10X-6X=15-21.56.5X=6.5X=1(4)4X+3(2X-3))=12-（X+4）4X+6X-9=12X-4810X-12X=-48+9-2X=-57X=28.5(5) 7X+2(3X-3)=207X+6X-6=2013X=20+6 matlab解数值分析题p=(x-1)*(x-2)*(x-3)*(x-4)*(x-5)*(x-6)*(x-7)*(x-8)*(x-9)*(x-10)*(x-11)*(x-12)*(x-13)*(x-14)*(x-15)*(x-16)*(x-17)*(x-18)*(x-19)*(x-20)解为1,2,3……,20取多个非常小的数用软件工具求解方程p（x）+n*x^19=0,并 数学化简3x-x^2/5x+4 x 18/4x-12(3x-x^2)/(5x+4) x 18/(4x-12)