x-(50%+12)-[x-50%x+12]50%+8=18的答案等于多少

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x-(50%+12)-[x-50%x+12]50%+8=18的答案等于多少x-(50%+12)-[x-50%x+12]50%+8=18的答案等于多少x-(50%+12)-[x-50%x+12]50%+

x-(50%+12)-[x-50%x+12]50%+8=18的答案等于多少
x-(50%+12)-[x-50%x+12]50%+8=18的答案等于多少

x-(50%+12)-[x-50%x+12]50%+8=18的答案等于多少
x-12.5-0.25x-6+8=18
x-0.25x=18-8+6+12.5
0.75x=28.5
x=28.5÷0.75
x=38

x-1)(X-2)(x-3)...(x-50)+x(x-2)(X-3)...(X-50)+...+x(x-1)(x-2)...(x-49)等于多少? 50x(x-1)+60x(x-4)=5100 (x+1)+(x+2)+(X+3).+(x+50)=1325 x+ x+(x*50%)=1.5X? 初一1道解方程,步骤要详细X/12+X/7+X/8+X/4+X/20+X/5+30+120+300+50=X X-X/12-X/7-X/8-X/4-X/20-X/5-30-120-300=50解方程如果3x*x-x=1那么9x*x*x*x+12x*x*x-3x*x-7x+2001等于多少 x/x+(1-x)/x-1/x x+3x+x-2+x+x+50%x=188 求x 一元一次方程：x-100/50-2=x-100/60+5 x/120-x/130=2 6x+x-1/5+1=100 2x-1/3-10x+1/12=2x+1/4-1 解方程 40%x=12 （1+60%）x=24 （1-37.5%）x=10 2x+50%x=20 40%x+30%x=140 35%x-15%x=72 50X+(50-5)(X+1)=425,x=? =(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 =（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 20%x+[25*(20%x)]+12=50%x+2 5(x/10+x/12)=x-50怎么解 x/40+x/50=1+1/200*x 80%X*(1+50%)=10+X 求X是多少?