5x+8x=260

(x+8)(x+6)(x+7)+(x+5)(x+6)(x+7)=(x+5)(x+8)(x+7)+(x+5)(x+8)(x+6)方程左边=(x+8)(x+6)(x+7)+(x+5)(x+6)(x+7)=(x+6)(x+7)(x+8+x+5)=

7x(x+8)+5x=260解方程7x(x+8)+5x=2607x²+56x+5x-260=07x²+61x-260=0判别式=61²+4×7×260=11001x=(-61±√11001)/147x(x+8)

(x+12)(x-2)+(x+7)(x+8)-(x+5)(x-10),其中x=2=x^2+10x-24+x^2+15x+56-x^2+5x+50=x^2+30x+82=4+60+82=146其实,不化简,直接代入=14*0+9*10+7*8

x+5x除以8=260x+5x/8=2608x+5x=208013x=2080x=160

x-4/x-5-x-5/x-6=x-7/x-8-x-8/x-9求x=?(X-4)/(X-5)-(X-5)/(X-6)=(X-7)/(X-8)-(X-8)/(X-9)[(x-4)(x-6)-(x-5)2]/(x-5)(x-6)=[(x-7)(

(x+7/x+6)+(x+9/x+8)=9x=(x+10/x+9)+(x+6/x+5)(x+7/x+6)+(x+9/+x+8)=(x+10/x+9)+(x+6/x+5)(x+9/+x+8)-(x+10/x+9)=(x+6/x+5)-(x+7

x+2/x+1-x+4/x+3=x+6/x+5-x+8/x+7x=?x+2/x+1-x+4/x+3=x+6/x+5-x+8/x+71+1/(x+1)-1-1/(x+3)=1+1/x+5)-1-1/(x+7)1/(x+1)+1/(x+7)=1

3x+5x=8x.3x+5x=(3+5)X=8x

8x-5x=()x答案是：3

8x(x-5)=3x我试试

x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?x(1+2+...+9)=x(9-8-7-...-1)x=0记得采纳啊

x=260+x/3+x/4+x/5求解先通分式子左右两边的每一项乘以分母的最小公倍数60得：60X=260x60+20X+15X+12X移项整理得：60X-20X-15X-12X=260x60合并13X=260x60X=1200您看明白了吗

(5x-2)*(x+8)=5x*x+98(5x-2)(x+8)=5x²+985x²+38x-16=5x²+9838x=114x=3(5x-2)*(x+8)=5x*x+985X^2+40X-2X-16=5X^2+

8x+3(x-2)=5x+(x-3)8x+3x-6=5x+x-311x-6x=35x=3x=3/5

X-5+8*X=7*X-2*X-1变形得9X—5=5X—1得4X=4得X=1x=1①50(x+0.2)=60(x-1),50x+10=60x-60,10x=70,x=7.②50(x-2+8)=(50+10)(x-2-7),50(x+6)=6

(x-8)(x-5)=x*x-415=>x*x-13x+40=x*x-415=>13x=455=>x=35x*x-13x+40=x*x-415-13x=-455x=35希望能帮助你。

x-8/x-4=2-x-5/x-7每个分式减去1(x-4-x+5)/(x-5)+(x-8-x+9)/(x-9)=(x-7-x+8)/(x-8)+(x-5-x+6)/(x-6)1/(x-5)+1/(x-9)=1/(x-8)+1/(x-6)通分

x×x-(x-8)×(x-5)=415X=35

已知A={x|x*x-ax+a*a-19},B={x|x*x-5x+8=2},C={x|x*x+2x-8=0}.若空集真包含于A交B,且A交C=空集,求a的值a=-2因为空集真包含于A交B,A交C=空集所以A交B={3}把x=3代入x方-a

初二分式方程x+3/x+4+x+8/x+9=x+4/x+5+x+7/x+8解(x+3/x+4)+(x+8/x+9)=(x+4/x+5)+(x+7/x+8)(x+3)/(x+4)+(x+8)/(x+9)=(x+4)/(x+5)+(x+7)/(