|X-12|与|y+2|互为相反数,求3X-2y
若|x-y+3|与|x+y-1999|互为相反数,求x+2yx−y
|X-12|与|y+2|互为相反数,求3X-2y
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.
(5x+2y-12)的平方与3x+2y-6的绝对值互为相反数,求x+y
已知(x+5y-13)的平方与|2x+3y-12|互为相反数,求x,y的值
已知|2-x|与|x-y+4|互为相反数,求代数式3(x-y)-5(x-y)-3(x-y)+(y-x)-4(x+y)+3
已知(x+3)^2与丨y-2丨互为相反数,求x^y的值,
若|x十3|与|2y一3|互为相反数,求x+y的值.
|x-3|与|y+3|互为相反数,求2x+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!