12-6x=2.4

6x=12x20，只有这个答案你2啊

x/6+x/12+x/20+x/30=1x/6+x/12+x/20+x/30=13x/12+5x/60=115x+5x/60=120x=60x=60÷20x=3

(2-x)(6-x)(12-x)(20-x)==(x²-8x+12)(x²-32x+120)=x^4-32x³+120x²-8x³+256x²-960x+12x²-384

1、x/x-3=x+1/x-12、x/x-1-3/1-x=43、x^2-4x=54、3x^2-6x+1=0还有一个解不等式：5x-12>2(4x-3)1、x/x-3=x+1/x-1（x-3)(x+1)=x(x-1)x²-2x-3=

4x-3（12-x）=6x-2(8-x)2.4-0.4分之（x-5）=0.05分之（1-2x）4x-3（12-x）=6x-2(8-x)4x-36+3x=6x-16+2x4x+3x-2x=-16+365x=20x=42.4-0.4分之（x-5

求解2X*X-6X=5X-15在线等还有是x*x-7x+121.2x平方-11x+15=(2x-5)(x-3)x1=2.5x2=32.((x-4)(x-3)x1=4x2=3

(x-2)(x-3)+2(x-5)(x+6)-3(x^2-7x+12)其中x=-5/2(x-2)(x-3)+2(x-5)(x+6)-3(x^2-7x+12)=x^2-5x+6+2x^2+2x-60-3x^2+21x-36=18x-90=18

1/x(x+2)+1/(x+2)(x+4)+1/(x+4)(x+6)=3/2x+12这应该是一道解方程吧?题目好像有点问题哦等号右边应该是3/(2X+12)不然算不到整数哦

(x-2)(x-3)+2(x+6)(x-5)-3(x²-7x+12),其中x=2.(先化简再求解)原式=x²-5x+6+2（x²+x-30)-3x²+21x-36=x²-5x+6+2x

4x-5/6=128x-3x=15.52.4*x=6*2.5fd4x-5/6=12如果是4x-(5/6)=12则4x=12+5/6=77/6x=(77/6)÷4=77/24如果是(4x-5)/6=12则4x-5=12*6=724x=72+5

x+6x=8.42.4x+x=27.29x-4.2x=24x-0.6x=4.88.6x-4.6x=10.47x+0.3x=3.65解方程要过程详细.晕

(X-12)/4=4.55*(X+2.4)=25.54*(90-6*X)=484*(35-X)=846*X-0.75*40=62*(X+1.7)=9.2解出来,并检算.?不好意思,头有点晕,你的题目我看不懂,请你再修改题目,????????

(6x-12)(8x+5)=(4x-3)(6x-12)求x(6x-12)(8x+5)=(4x-3)(6x-12)(6x-12)(8x+5)-(4x-3)(6x-12)=0(6x-12)[(8x+5)-(4x-3)]=06(x-2)(8x+5

观察下列方程：x+2/x=3x+6/x=5x+12/x=7观察下列方程：x+2/x=3x+6/x=5x+12/x=7请利用它们蕴含的规律,求关于x的方程x+(n^+n)/(x—3)=2n+4(n为正整数)的根,你的答案是多少?数列an=n+

6/x=2x,x=?2x=16/x,x=?13x=12/x,x=?6/x=2x,3=x^2x=±√32x=16/x,x^2=8x=±2√213x=12/xx^2=12/13x=±2√(3/13)这可不是小学二年级的题.

x-o.8x=612x-8x=4.83x-8=167.5x-2xx-0.7x=3.6求答案x-o.8x=6X=3012x-8x=4.8X=1.23x-8=16X=8x-0.7x=3.6X=127.5x-2x这题没有=

5x/x的2次方+x-6+2x-5/x的2次方-x-12=7x-10/x的2次方-6x+85x/(x的2次方+x-6)+(2x-5)/(x的2次方-x-12)=(7x-10)/(x的2次方-6x+8)5x/[(x-2)(x+3)]+(2x-

5x/(x^2+x-6)+(2x-5)/(x^2-x-12)=(7x-10)/(x^2-6x+8)快,好的话分加倍!/前是分子,/后是分母5x/(x^2+x-6)+(2x-5)/(x^2-x-12)=(7x-10)/(x^2-6x+8)5x

当x=时,3x(x-1)-x(3x-6)=124

方程2/x+6/x+12/x+```+2008*2009/x=2008的解x=提出x得到：x*(1-1/2+1/2-1/3+1/3-1/4……+1/2008-1/2009)=2008接着：x*(1-1/2009)=2008最后：x=2009