若x/3=y/4=z/5,则x+2y+3z/2x的值为——————————————————————————————————
答案:4 悬赏:50
解决时间 2021-03-02 09:04
- 提问者网友：朱砂泪
- 2021-03-02 03:01
若x/3=y/4=z/5,则x+2y+3z/2x的值为——————————————————————————————————
最佳答案
- 二级知识专家网友：為→妳鎖鈊
- 2021-03-02 03:47
设x/3=y/4=z/5=k
则
x=3k
y=4k
z=5k
则
x+2y+3z/2x
=(3k+8k+15k)/(6k)
=(26k)/(6k)
=13/3
则
x=3k
y=4k
z=5k
则
x+2y+3z/2x
=(3k+8k+15k)/(6k)
=(26k)/(6k)
=13/3
全部回答
- 1楼网友：错过的是遗憾
- 2021-03-02 07:23
x/3=y/4=z/5=k
x=3k,y=4k,z=5k
x+2y+3z/2x=(3k+8k+15k)/(6k)=13/3
- 2楼网友：飘零作归宿
- 2021-03-02 05:45
设x/3=y/4=z/5 =t x=3t y=4t z=5t 所以 x+2y+3z/2x =3t+2*(4t)+3*(5t) / 2*3t =26t/6t =13/3
- 3楼网友：瘾与深巷
- 2021-03-02 04:48
由已知得：Y=4X/3；Z=5X/3，
所以X+2Y+3Z/2X
=X+8X/3+5X/2X
=11X/3+5/2
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