若X、Y互为相反数,计算X+2X+3X+...+100X+100Y+99Y+98Y+.Y的值
若X,Y互为相反数,且(X+Y+3)(X-Y-2)=0,求X,Y的值?
若|x+y|与|2y-3|互为相反数,求2x+y的值
若|x+y|与|2y-3|互为相反数,求2x+y的值.
答好送100分已知|x-y|与(y+x)互为相反数,求x+y的值
已知|x-y+3| 根号2x+y互为相反数求x+y的值
|x-y+3|与|x+y-99|互为相反数,求x-y除以x+y的值
若|X-3|与|Y+2|互为相反数,求x+y+99的值!
已知x,y互为相反数,求x分之y+3x+3y的值
若X+2Y+3的绝对值与(2X+Y)^2互为相反数,则求X,Y的值
若|x-y+3|与|x+y-1999|互为相反数,求x+2yx−y
若根号x-2y+9与x-y-3的绝对值互为相反数,则x+y的值为
若根号x-2y+9与x-y-3互为相反数求x+y的值