解方程组 9x+10y=1810 ① 12x+8y=1880 ②
解方程组 9x+10y=1810 ① 12x+8y=1880 ②
解方程组:2/(x+y)+5/(x-y)=18 9/(x+y)-10/(y-x)=66
解方程组:2/(x+y)+5/(x-y)=18 9/(x+y)-10/(y-x)=66
解方程组 2x+y(y-2x)=9 (x+y)(x+y-3)=10
解方程组:(x+3)(y-2)=(x-3)(y+10),(x+1)(y+3)=(x-2)(y+12)
解方程组:①x+y+根号下x+y=12 ②x+xy+y=23
解方程组{5x+2y=6 ① 2x+5y=8 ②
方程组x-y=500① x+15%-(y-10%y)=950②
解方程组①x+3y=7②x²-9y²=-35 解方程组①x²-xy-2y²=0②
x+|2x+y|=10 解方程组{ x-2y=8
解方程组 2x+y+z=7 x+2y+z=8 x+y+2x=9
解方程组2x+y+x=10 x+2y+z=-6 x+y+2z=8