(x/30*0.8*3)+(x/30*10) 求X的值 .(x/30*0.8*3)+(x/30*10)=1144 求X的值

求x^2-3x/x^2-6x+9*x^2-11x+30/x^2-5x-1 x^3+x-30(分解因式);x^12-y^12;x^15+x^14+x^13.x^2+x+1 1/x(x+3)+1/(x+3)(x+6)+---+1/(x+27)(x+30） 计算：(x+1)x=7 (x-1)(x+2)=30 (3-x)(3-x)+x=9 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 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 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 0.8x=x-30 x= （x-2)/30+(x-3)/45+x/90=1 3X+30+X+X-15=? x+35=(x+3x)*30% 解方程(x^2-3x+1)(x^2-3x+2)(x^2-9x+20)=-30 3x+30×(1-x)=3.27 求解不等式（1）x^-2x+30 (3)x^w-2x+1>0（1）x^-2x+30(3)x^w-2x+1>0 (x^2-3x+1)^3怎么算出x^6-9x^5+30x^4-45x^3+30x^2-9x+1 9x平方成(x-1)平方-30x乘(x-1)-56得多少?(x平方+4x+3)(x平方+12x+35)得多少? 分解因式(x^2-3x)/(x^2-6x+9)×(x^2-11x+30)/(x^2-5x)-1