(7x-30)/(3x+30)=3/2如何解?

x-2/3x+x+2/7x=30 X:Y=4:7 X:Z=3:5 X-2Y+3Z=30如题 计算：(x+1)x=7 (x-1)(x+2)=30 (3-x)(3-x)+x=9 x*x+2x+x*x+10x+x*x+25+2x+x*x+1+1+16+x*x+4x*x+9-12x+16x*x+4-16x=30x*x-7x-15 求x,可以只要答案.如图,全是正方形,一个边长为1,一个边长为4,求总面积,你也可以用你的方法.上面那个方程是我列的.5x*X+7X-72=0 解方程X^3－7X^2+14X－8=0如题 VB求 接近判断关系.如图 combobox 已经搞定dim x(30) as integer X(0) = 0X(1) = 40 ‘x()=后面所对应的数字都是0级 至当前等级所需经验总合X(2) = 150X(3) = 387X(4) = 837X(5) = 1616X(6) = 2868X(7) = 4 x/2+x/6+x/12+x/20+x/30+x/42=1如题,解方程,在线等 x^3+6+1/x^3=2(x+1/x)^2 求x+1/x如题 -7x+2=2x-4 2x-1/3=-x/3+2如题! *-----------------------------------------------*| 6 4 X | 8 X X | X X 5 || X X X | X X X | X 7 8 || X X X | X X X | X X X ||---------------+---------------+--------------- || X X X | X X X | 5 1 X || X X X | X 6 X | X X X || 8 X X | 3 5 X | 2 X X || y=x^3-5x^2-x-3/x^2求导过程如题 解方程如图3x/(x^2)+(x^-1)/3x=5/2 x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少? 已知x^2+x-1=0,求x^3-2x+2009如题 如何用秦九韶算法算 f(x)=x^3-2*x^2-5*x+6 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 填九宫格帮帮忙.x x 6 x x 7 x x 98 x x x 3 x 1 x x 9 x x 6 x 5 x 3 x x x 3 x x x x 1 8x x x 9 x 1 x x x2 1 x x x x 6 x x x 6 x 7 x 3 x x 1 x x 9 x 2 x x x 47 x x 8 x x 5 x x 7x-5(x-3)=21如题