|3x+5y-13|和（5x+3y-11）^2互为相反数,则x+y等于多少

|x|=3 |y|=5 |x-y|=|x|+|y| 求 X+Y和 X-Y 等于多少 |3x+5y-13|和（5x+3y-11）^2互为相反数,则x+y等于多少 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 5X+Y=3 X+5Y=2 求x和y.5X+Y=3X+5Y=2求x和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 5 x=3 y,x和y成()比例 若5:x=3:y,那么x和y x+y=1 5x-2y=8 3x-y=7 2x-y=3x表示y和用y表示x 化简:5(x-y)+2(x+y)-3(x-y) (y-x)(x-y)^3(y-x)^5怎么算 已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y) (2x-3y)-(5x-y) (2X-3y)-(5x-y) (2x-5y)(3x+y) 计算(x+y)(x-y)(x+y)3次方(x-y)5次方计算(x+y)×(x-y)×(x+y)3次方×(x-y)5次方 因式分解(x-2y)(x-3y)+(x-4y)(x-5y)+（x-3y)(x-5y)+(x-2y)(x-4y)