7x+2y=52 7x+4y=62
已知实数x.y满足根号(x+y-8)+根号(8-x-y)=根号(3x-y-4)+根号(x-2y+7),求x,y
解方程组(x+y)(x-2y)=-5 (x-y)(x+2y)=7
若(x-y)/(x+y)=3 则(x+2y)/(6x-7y)等于
4x-(2x+y+16)/2=-6y 2x+3y=7-x-2y
方程2分之x+y+2分之x-y=7,4(x+y)-5(x-y)=2
int x,y,z; x=2; y=4; z=7; x=y--
7x+2y=52 7x+4y=62
已知X和Y满足3X+4Y=2,X-Y-1/7
若2x-3y+4=0则x(x*x-1)+x(5-x*x)-6y+7
2x+3y分之7x-4y=2x-2y分之2x+2y x=3,y=?
3x+2=y 5X+4=Y 7X+6=Y 9X+8=y 11x=y要如何计算
3x+2=y 5x+4=y 7x+6=y 9x+8=y 11x=y