40%x-50%x=6

40%x-50%x=6 x-x-6=40 x+ x+(x*50%)=1.5X? x-40%x= 解方程26(8-X)-6=150 4x-2(x+20)=40 4x-2(100-x)=40 4x-2(50-x)=20 9(x-8)=8x=10 x/x-2+x-9/x-7=x+1/x-1+x-8/x-6, x/x-2+x-9/x-7=x+1/x-1+x-8/x-6, 解分式方程：1/X-2+1/X-6=1/X-7+1/X-11/X-2+1/X-6=1/X-7+1/X-11/(x-2)-1/(x-1)=1/(x-7)-1/(x-6)(x-1-x+2)/(x-2)(x-1)=(x-6-x+7)/(x-7)(x-6)1/(x-2)(x-1)=1/(x-7)(x-6)(x-2)(x-1)=(x-7)(x-6)x^2-3x+2=x^2-13x+4213x-3x=42-210x=40x=4 为什么要移向才能解 解方程,亲们帮帮忙!2／3＋50％x＝1.6 x＝?x-40%x=0.96 x=?4/5x-1/2x=6.4 x=?80%x-0.6x=0.12 x=?1/2(x-80%)=0.6 x=?4(x+1/4)=16 x=?40%+20%x+7.2 x=?5/6(x-40%)=2 50x=40x(18-x)怎么解 75%x+40%X(14-x)=50%X14 x/40+x/50=1+1/200*x =（x^2-5x+4)(x^2-5x+6) =(x^2-5x)^2+10(x^2-5x)+24 是怎么转化的(X-1)(X-2)(X-3)(X-4) =(X-1)(X-4) (X-2)(X-3)=（x^2-5x+4)(x^2-5x+6)=(x^2-5x)^2+10(x^2-5x)+24=x^4-10x^3+25x^2+10x^2-50x+24=x^4-10x^3+35x^2-50x+24不好意思我弄错了，是=（x^2-5 =(x^2-5x)^2+10(x^2-5x)+24 =x^4-10x^3+25x^2+10x^2-50x+24 这是怎么转化的(X-1)(X-2)(X-3)(X-4) =(X-1)(X-4) (X-2)(X-3)=（x^2-5x+4)(x^2-5x+6)=(x^2-5x)^2+10(x^2-5x)+24=x^4-10x^3+25x^2+10x^2-50x+24=x^4-10x^3+35x^2-50x+24 18x+[5-x]=40+6x 18x+[5-x]2=40+6x （x+6）/(40+x)=20%求x. x加30%x=52、x减40%x=15、50%x加x=31.5、x减1%x=19.8、x加25%x=2.5、x减15%x=8.5