15x+16=5x+80
x=4x=254 5x-x=180 3x+x=16 4x-2x=28 15x-11x=12.8 (12+12*1.5)x
x+x=x+15
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550
用递归法求y=x-(x*x*x/3!)+(x*x*x*x*x/5!)-(x*x*x*x*x*x*x/7!)+.
x/x-4 - 32/x的平方+16=1 x+1/x + 5X/x+1=6
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
130%x+x=4.6 x÷50%=10 x/9-x/15=16%
5x+15/x^2+x-6=A/x-2+B/x-3
∫(x^4-4x^2+5x-15)/(x^2+1)(x-2) dx=?
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
解下列方程 x-8=16 5x=80 43-x=38 20-x=9 6.31÷x=7 x÷4.
x+15%x=3.22 ,1/2x-25%x=10 ,x*(1-37.7%)=5/8 ,40%x=16 ,19-120%