已知3x-5y=0,求x/x+y我不太明白.x/(x+y )
问题描述:
已知3x-5y=0,求x/x+y
我不太明白.
x/(x+y )
答
x=5y/3
x/(x+y)=(5y/3)/(5y/3+y)=5/8