求6x+4(1.9-x)=9

x-4/x-5 - x-5/x-6=x-7/x-8 - x-8/x-9求x=? 求方程解x-5/x-4+x-9/x-8=x-8/x-7+x-6/x-5 x-4／x-5-x-5／x-6=x-7／x-8-x-8／x-9求大神帮助 已知x=2π+1求 |x-1|+|x-2|+|x-3|+|x-4|+|x-5|+|x-6|+|x-7|+|x-8|+|x-9|+|x-10| 已知x=2π+1.求(X-1)+(X-2)+(X-3)+(X-4)+(X-5)+(X-6)+(X-7)+(X-8)+(X-9)+(X-10) 求6x+4(1.9-x)=9 1X?+2X?+3X?+4X?+5X?+6X?+7X?+8X?+9X?+10X?=1980求?是多少 4X+6X=9X,求：x的值 x在上面,是次方 6x+4x=9x 求x x是次幂谢谢了, 4x-5=25-9x+x 求x? 4×3^2x-9×2^2x=5×6^x ,求x.4×3^2x-9×2^2x=5×6^x求x X+2分之X+3-X+4分之X+5=X+6分之X+7-X+8分之X+9,求X的值 2.X-5分之X-4加X-9分之X-8=X-8分之X-7加X-6分之X-5,求X 求一个数独答案X X X 9 X X X 8 2 X 6 3 X X 1 4 X 99 X 8 X X X X X XX X X 6 7 X 3 X XX 4 6 X 5 X 2 9 XX X 7 X 2 3 X X XX X X X X X 7 X 17 X 4 3 X X 6 2 X6 3 X X X 7 X X X matlab中a(x)=x^4+3x^3+9x-18 b(x)=x^5-4x^3-18x+7 c(x)=x^7+6x^5+9x^3-5x^2-2 d(x)=x^9-8x^7+6x^5-4x^4+d(x)=x^9-8x^7+6x^5-4x^4+6x^2+3 求e(x)=a(x)*b(x)*c(x)*d(x) 已知x=1/x,求x^2-6x+9/x-3/x+3/x^2+6x+9 4*4^x-5*2^x-6=0,求x的值 9^x+6^x=2^(2x+1) 求x值两题啊 3x^2+4x+6=9,求x^2-3/4x+6