12x=300减4x解方程

X-X/12-X/7-X/8-X/4-X/20-X/5-30-120-300=50解方程没写错吗?化简5X/12-15X/56=50060X/168-45X/168=50015X/168=500→X=5600

解方程12x=300-4x16x=300x=18.75四分之七十五12x=300-4x12x+4x=30016x=300x=18.75

12x=300-4x的解方程.12x=300-4x12x+4x=30016x=300x=300÷16解得x=18.75

12x=300一4x,解方程12x=300一4x移项得：12x+4x=30016x=300x=18.7512x＝300-4x12x+4x＝30016x＝300x＝300/16即x＝75/4。

12x=300一4x解方程16x=300x=75/4

12x=300-4x这类方程咋解,1.移项（或者等号两遍同时+4x)得16x=3002.等号两遍同时除以16得x=18.75

解方程：x-40%x+12=x-1/4x-0.4x+12=x-0.250.4x=12.25x=30.6250.6x-x=-1/4-12x=8/650.4x=12+0.25x=30.625

解方程：X(X+4)=8X+126或-2（x+2）（x-6）=0好好学习啊X^2+4X=8X+12X^2-4X=12X=6x^2+4x=8x+12x^2-4x+4=16(x-2)^2=16x-2=4x-2=-4x1=6x2=-2解:x*x+

(x-1)(x-3)(x-4)(x-12)+5x^2=0解方程(x-1)(x-3)(x-4)(x-12)+5x^2=0(x-1)(x-12)(x-3)(x-4)+5x^2=0(x^2-13x+12)(x^2-7x+12)+5x^2=0[(x

12x=300-4x怎么解方程要方程哦12x=300-4x12x+4x=30016x=300x=300÷16x=18.7512x+4x=300x=300÷16x=18.7512x+4x=30016x=300x=300/16x=18.7512

解方程：x-12=[x-(x-12)]/(x-12)设y=x-12y=(y+12-y)/y=12/yy²＝12y=2√3x-12=2√3x=12+2√3x-12=[x-(x-12)]/(x-12)(x-12)(x-12)=12x-

解方程；x/x-4=5x/x-2解方程；x/(x-4)=5x/(x-2)去分母得x(x-2)=5x(x-4)x²-2x=5x²-20x4x²-18x=2x(2x-9)=0故得x₁=0,x₂

解方程：x(x-4)=(x-2)(x-6)x(x-4)=(x-2)(x-6)x^2-4x=x^2-8x+12x^2-x^2-4x+8x=124x=12x=3您好：x(x-4)=(x-2)(x-6)x^4-4x=x^2-8x+128x-4x=

求文档:解方程：x-x/12-x/7-x/8-x/4-x/20-x/5=30+120+300+50x-x/7-(x/12+x/8)-(x/4+x/20+x/5)=500x-x/7-(5/24)x-x/2=500(1/2-5/24)x-x/7

4x+12=50解方程三分之二x+六分之一x=15解方程 

x+x/5=300解方程x＋x/5=3001x＋X/5=3006X/5=3006X÷5=300300×5=6x1500÷6=250x+x/5=3006x/5=300x=300*5/6x=250x+x/5=3005x+x=15006x=150

解方程：x(300-x)=20900X=190或者110

(300-x)/(180-x)=4方程,(300-x)/(180-x)=4x不能等于180.300-x=4（180-x）300-x=720-4x3x=420x=140(300-x)/(180-x)=4300-x=4(180-x)300-x=

x-60％x=12【解方程】x-60％x=12x-0.6x=120.4x=12x=12/0.4x=3040%x=120.4x=12x=30(1-60%)x=12

x-50%x=12解方程x-50%x=120.5x=12x=24