2x+[0.8×924-x]=30

2x+[0.8×924-x]=30 0.8x=x-30 x= 2x+[0.8×(24-x)]=30 解方程 0.8X*(X+2)=X*X 解方程 0.8X*(X+2)=X*X X-0.8X=2 x-2/3x+x+2/7x=30 x^2=(x+30)X(x-18)怎么解 x+x=() x*x=() x-0.8x=() 1.2*2y=() (x+30)*(x-18)=x*x 解方程:x/4=30% 36/x=3/4 10/x=2.5/0.8 x/4=1.2/5 X/1.2=1.5/0.6 x/0.4=1.5/6 x/7=0.6/3.5 x/10=0.1/25-3x=8x+1 2(x-2)+2=x+1 3-x=2-5(x-1) 3x=5(32-x) 7(4-x)=9(x-4) 7x-8=2x+27 5x-18=3-2x (7x-4)+3(x-2)=2x+6 2(3x-4)+(4-x)=4x我是六年级的学生,我希望 f(x)=x^2+x (x 5x-4x=2*1.8,5x-2+3x=3.6,x+4x=20.3,8x+10-3x=30,10.5-0.5x+0.5=1,x+2x+5x=10,解方程,5x-4x=2*1.8,5x-2+3x=3.6,x+4x=20.3,8x+10-3x=30,10.5-0.5x+0.5=1,x+2x+5x=10,0.8x-0.2+1.2x=1.8,2.4x+0.6+1.6=8 x-2/5x-(x-2/5x)2/3-(2/5x-1/3x)=30求x (x^2-3x+1) (x^2+3x+2)( x^2-9x+20)= -30求X 计算：(x+1)x=7 (x-1)(x+2)=30 (3-x)(3-x)+x=9 X+0.8X=? x^2=x