X+4X=10,5y+3x=16,请问x=?y=?要具体步骤.

X+4X=10,5y+3x=16,请问x=?y=?要具体步骤. 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!)+. int x=1,y; y=x>3?++x:x>5?++x:x=x+10; 请问这个计算式中顺序怎么算? xy²/(x²y-y) × x²/(x²+x)=(x²-3x)/(x²-5x) × 2x-10/(x²-6x+9)=化简求植x²-1/(x²-x-2)除以x/2x-4,其中x=1/2[x-x/(x+1)]除以[x/(2x-4)] ,其中x=√2+1 y=|-x.x+4x+5| 若2x-3y+4=0则x（x*x-1)+x(5-x*x)-6y+7 5X+16X= Y+9Y= X+7X-4X= 请问算到4x/y=3y/x后怎么算出x,y, （x+y-5)*（x+y-5)+（x-y+3)=0 x*x-y*y 已知:3x-5y=0,求x/y,x-y/y,x-y/x （5x+3y)(3y-5x)-(4x-y)(4y+x)= 4(x-y)-3(x-y)=9 5(x-y)+2(x-y)=11 3(x+y)-4(x-y)=11,2(x-y)+5(x+y)=27 3(x+y)+2(x-y)=36 4(x+y)-5(x-y)=2 (4x-2y-z)-{5x[8y-2y-(x+y)]-x+(3y-10z)]=? kuaihuajian 先化简再求值(x-y)(x-2y)+(x-2y)(x-3y)-2(x-3y)(x-4y) x=4 y=5 y=x^2+10x+16 and Y= 2x+4x^2+y^2=5 y=3x-1 x-y+5x-4x= ?x-y+5x-4x= ?