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
若|x+y|与|2y-3|互为相反数,求2x+y的值.
若|x十3|与|2y一3|互为相反数,求x+y的值.
若|x-3|与|2y+7|互为相反数,求x+y+3的值 急,
若|X-3|与|Y+2|互为相反数,求x+y+99的值!
若|x+6|与|3y-2|互为相反数,求x+y的值.50分
若X+2Y+3的绝对值与(2X+Y)^2互为相反数,则求X,Y的值
若根号x-2y+9与x-y-3互为相反数求x+y的值
若|x-y+3|与|x+y-1999|互为相反数,求x+2yx−y
若|2x+y-3|与(y-2)²互为相反数,求4x²y-3xy的值?
若X,Y互为相反数,且(X+Y+3)(X-Y-2)=0,求X,Y的值?
已知(x+2)²与|y-3|互为相反数,求x的y次方的值