2.5x-50=x-5

2.5x-50=x-5 x+ x+(x*50%)=1.5X? 用递归法求y=x-(x*x*x/3!)+(x*x*x*x*x/5!)-(x*x*x*x*x*x*x/7!)+. 3道简单的分式方程,1.3/(1-x^) = 2/(1+2x+x) - 5/1-2x+x^2.5x/(x^+x-6) + (2x-5)/(x^-x-12) = (7x-10)/(x^-6x+8)3.(x+1)/(x+2) + (x+6)/(x+7) = (x+2)/(x+3) + (x+5)/(x+6) X-X/12-X/7-X/8-X/4-X/20-X/5-30-120-300=50解方程 10x+2x*[(50-x)/2]+5x[(50-x)/2]=240 x-三分之一x-四分之一x(x-三分之一x)=5 5x+x-2.5x=56解方程, (x+x+2.5)*(3/5)=75-(3/7)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 50X+(50-5)(X+1)=425,x=? 5x^-15x=50除以5x 解方程：60%x+5+50%x-25=x x-5%x-50%x×60%=36解方程 5(x/10+x/12)=x-50怎么解 2x+8-10x+50=5x-10 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