【1根据下列条件,分别求b分之a的值,1)b/a+b=5/72)a-b/a+b=2/52,已知x:y:z=3:4:5.1)求z/x+y.2)若x+y+z=6,求x、y、z的值3.已知2x=3y=4z,求2x-y+z/x+y+z的值4.已知1,根号2,3三个数,请再添一个数,写出一个比例式.大题是针】
<p>问题：【1根据下列条件,分别求b分之a的值,1)b/a+b=5/72)a-b/a+b=2/52,已知x:y:z=3:4:5.1)求z/x+y.2)若x+y+z=6,求x、y、z的值3.已知2x=3y=4z,求2x-y+z/x+y+z的值4.已知1,根号2,3三个数,请再添一个数,写出一个比例式.大题是针】<p>答案：↓↓↓<p class="nav-title mt10" style="border-top:1px solid #ccc;padding-top: 10px;">潘渊颖的回答：<div class="content-b">网友采纳 1)b/a+b=5/7∵b/(a+b)=5/7∴(a+b)/b=7/5a/b+b/b=7/5a/b+1=7/5∴a/b=2/52)a-b/a+b=2/5∵(a-b)/(a+b)=2/55a-5b=2a+2b3a=7b∴a/b=7/32,已知x:y:z=3:4:5.1)求z/x+y.令x:y:z=3:4:5=k∴k=5x=4y=3zk/5=xk/4=yk/3=z∴z/(x...
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