x等于y+y+y,x+y=48,求x是几?y是几?急

x等于y+y+y,x+y=48,求x是几?y是几?急 x+x+x=15,x+y+y=19,求y-x等于几 y*y*y*y+2x*x*x*x=4x*x*y 求x等于几,y等于几,写出所有选项! x、y等于几 (-x+y)(x-y)等于几 y²+3x=7,y³+x=3,求y等于几. 已知X+Y=12 Y+Z=10 求X Y Z各等于几 (x*x+y*y)(x*x+y*y)-(x*x+y*y)=12 求x*x+y*y等于多少 X+Y=90,X/Y=5,请问X等于几?Y等于几? x+3=5-y,那么x+y等于几 X=y 求x等于几(阿拉伯数字） X加Y=320 X等于Y加Y加Y X和Y各等于几 x乘y等于48,且x=y,求x,y的值 x乘以y等于几 X加Y等于几 (X+Y)^2等于几 X+Y等于几呵呵? x加y等于几?