X+250×18=2(x+120×18)的解

90-x=2x(18+x) x/(x^2+6x+18)=? x+2/3x=60 x-3/5x=120 4x+18x=1x+2/3x=60 x-3/5x=120 4x+18x=132! x+3分之2 x=60 x-5分之3x=120 4x+18x=132x+3分之2 x=60 x-5分之3x=120 4x+18x=132 x+2/3x=60 x-2/5x=120 4x+18x=132 x+(x+3)+2x+(2x-18)=255 x^2=(x+30)X(x-18)怎么解 (x+30)*(x-18)=x*x X+250×18=2(x+120×18)的解 60％x+25=40 x+30％x=52 19-120％x=7 4分之3x-5％x=17.5 x-10％x=18 （1-25％）x=36 2x+30％x=9.2 解方程,帮个忙28+1.9X=4(6+0.6X) X+250×18=2（X+120×18） 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) 解方程 式子 6-2x+3x=3x-4x+3x+18 6-x+3x=2x-5x+1 2x-1=5x-36-2x+3x=3x-4x+3x+18 6-x+3x=2x-5x+12x-1=5x-3 x^2+x^-2=x^4,化简(x+x^-1+x2)(x-x^-1+x²)（-x+x^-1+x²）(x+x^-1-x²)第18题, 已知 X=4- 根号3 求 (X*X*X*X-6X*X*X-2X*X+18X+23) / (X*X-8X+15)的值紧急,,明天有用,, 1/x(x+3)+1/(x+3)(x+6)+1/(x+6)(x+9)=3/2x+18 1/x(x+3)+1/(x+3)(x+6)+1/(x+6)(x+9)=3/2x+18 1/x(x+3)+1/(x+3)(x+6)+1/(x+6)(x+9)=3/2x+18