(1+30%)X-(1+20%)75%X=36

x/6+x/12+x/20+x/30=1 (x^2-3x+1) (x^2+3x+2)( x^2-9x+20)= -30求X 解不等式 1.{x+382.{x/2+1x+2/53.{110045x+75(20-x) x/x+(1-x)/x-1/x 1/x+1/x-30=1/20 x=? x/1+x-30/1=20/1 x=? x*x*(1/4)=20x x/2+x/6+x/12+x/20+x/30+x/42=1如题,解方程,在线等 X/2+X/6+X/12+X/20+X/30+X/42=1用简便方法解 解方程(x^2-3x+1)(x^2-3x+2)(x^2-9x+20)=-30 20x=30(x-1) (1+30%)X-(1+20%)75%X=36 40%x+21=37x-78%x=2.2x+30%x=26(1-25%)x=1540%x-30=152x+20%x=3.3怎么列式计算jijiji40%x+21=37x-78%x=2.2x+30%x=26(1-25%)x=1540%x-30=152x+20%x=3.3 *-----------------------------------------------*| 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 || 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-2=(104-x)+2 6x-59=10x-75 (x+10)+(x-15)=280-x4（x-62)=x-38 60x-40=(60+20)*(x-5) 32x+32*0.5-25x+64x=24x+496-49x x+15=3*(109-x ) 5(3x-1.4)=2(6x-0.5) 3(x+0.9)=5(x-1.7) 13x-4(2x+5)=17(x-2)-4(2x-1) (13x+8)/3=5x-1x-60=2[(3561-x)+100]+1 (x+9)+12=2[(x-9)-1 x/2+x/8+x/12+x/20=1 因式分解(x+1)(x-2)(x-3)(x-6)+20