设x=2a，y=3a，z=4a则2a+3a+4a=189a=18a=2所以x=2a=4y=3a=6z=4a=8回答完毕~有疑问请追问，我一定尽快回复你~无疑问请点击【采纳】，同时预祝学习进步~\(^o^)/~我不是学霸，叫我赌神~\(^o^)/~~\(^o^)/~~\(^o^)/~~\(^o^)/~
